diff --git a/lib/std/Progress.zig b/lib/std/Progress.zig
index ba60f91233651a3874af442b3d109069b1586648..e99b298c1ed5e04a3c6d4a5dee2de5ed8adb541f 100644
--- a/lib/std/Progress.zig
+++ b/lib/std/Progress.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! This API non-allocating, non-fallible, and thread-safe.
 //! The tradeoff is that users of this API must provide the storage
 //! for each `Progress.Node`.
diff --git a/lib/std/SemanticVersion.zig b/lib/std/SemanticVersion.zig
index 17d5b6557160eae7a0ec0e974941bb0b07c44c30..fb09f85ff2539e49bd04a9f439a409d22dc1b2eb 100644
--- a/lib/std/SemanticVersion.zig
+++ b/lib/std/SemanticVersion.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2020 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A software version formatted according to the Semantic Version 2 specification.
 //!
 //! See: https://semver.org
diff --git a/lib/std/Thread.zig b/lib/std/Thread.zig
index b4232d695532233e006123425129c22ecf1be628..3c0a53612c49376629371c353b50a724f1d8b942 100644
--- a/lib/std/Thread.zig
+++ b/lib/std/Thread.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! This struct represents a kernel thread, and acts as a namespace for concurrency
 //! primitives that operate on kernel threads. For concurrency primitives that support
 //! both evented I/O and async I/O, see the respective names in the top level std namespace.
diff --git a/lib/std/Thread/AutoResetEvent.zig b/lib/std/Thread/AutoResetEvent.zig
index 13e404d60277905e433f557075b8bfc625334b62..49639d60e9d39ffc71cf6d2ecd1ff85f7db258ee 100644
--- a/lib/std/Thread/AutoResetEvent.zig
+++ b/lib/std/Thread/AutoResetEvent.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! Similar to `StaticResetEvent` but on `set()` it also (atomically) does `reset()`.
 //! Unlike StaticResetEvent, `wait()` can only be called by one thread (MPSC-like).
 //!
diff --git a/lib/std/Thread/Condition.zig b/lib/std/Thread/Condition.zig
index 9513e794edaf7ce54ae76f32903827ae99b44546..647a50b9136c4ec4c2c8411a718cfbdf1e6bb4e2 100644
--- a/lib/std/Thread/Condition.zig
+++ b/lib/std/Thread/Condition.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A condition provides a way for a kernel thread to block until it is signaled
 //! to wake up. Spurious wakeups are possible.
 //! This API supports static initialization and does not require deinitialization.
diff --git a/lib/std/Thread/Futex.zig b/lib/std/Thread/Futex.zig
index a896942d6ea7bccd046adec857a8588e0cf7d880..5a3da5cd9489fbbfc1d061e4e0f448b456fd9700 100644
--- a/lib/std/Thread/Futex.zig
+++ b/lib/std/Thread/Futex.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! Futex is a mechanism used to block (`wait`) and unblock (`wake`) threads using a 32bit memory address as hints.
 //! Blocking a thread is acknowledged only if the 32bit memory address is equal to a given value.
 //! This check helps avoid block/unblock deadlocks which occur if a `wake()` happens before a `wait()`.
diff --git a/lib/std/Thread/Mutex.zig b/lib/std/Thread/Mutex.zig
index 522d1fe4183d82ecb6b87e96c3259056e8c71a80..ee54a1582bbf1ac3844fe3f2e74fa4639fa2a549 100644
--- a/lib/std/Thread/Mutex.zig
+++ b/lib/std/Thread/Mutex.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! Lock may be held only once. If the same thread tries to acquire
 //! the same mutex twice, it deadlocks.  This type supports static
 //! initialization and is at most `@sizeOf(usize)` in size.  When an
diff --git a/lib/std/Thread/ResetEvent.zig b/lib/std/Thread/ResetEvent.zig
index bbf9e7263a0cd429377607e38c1d7c67cbd66e59..d9304dd70b768d1c1d5f3643a2784f33ef028084 100644
--- a/lib/std/Thread/ResetEvent.zig
+++ b/lib/std/Thread/ResetEvent.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A thread-safe resource which supports blocking until signaled.
 //! This API is for kernel threads, not evented I/O.
 //! This API requires being initialized at runtime, and initialization
diff --git a/lib/std/Thread/RwLock.zig b/lib/std/Thread/RwLock.zig
index 0721aad3f7cc82987e6b0af2cd56ea27b2d90345..cfe06c76e8021b285cb13d91d53217472aee84d5 100644
--- a/lib/std/Thread/RwLock.zig
+++ b/lib/std/Thread/RwLock.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A lock that supports one writer or many readers.
 //! This API is for kernel threads, not evented I/O.
 //! This API requires being initialized at runtime, and initialization
diff --git a/lib/std/Thread/Semaphore.zig b/lib/std/Thread/Semaphore.zig
index 169975b3626e50e780e68c12361423ca0d8894f5..b5bde88d736a907267af9ee7921561109fba711d 100644
--- a/lib/std/Thread/Semaphore.zig
+++ b/lib/std/Thread/Semaphore.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A semaphore is an unsigned integer that blocks the kernel thread if
 //! the number would become negative.
 //! This API supports static initialization and does not require deinitialization.
diff --git a/lib/std/Thread/StaticResetEvent.zig b/lib/std/Thread/StaticResetEvent.zig
index e15a6a0a5435e261a73e68505b104265eeb136c2..d779a4de9e2c7d232ef89a4b905dc19e851f9eb4 100644
--- a/lib/std/Thread/StaticResetEvent.zig
+++ b/lib/std/Thread/StaticResetEvent.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! A thread-safe resource which supports blocking until signaled.
 //! This API is for kernel threads, not evented I/O.
 //! This API is statically initializable. It cannot fail to be initialized
diff --git a/lib/std/array_hash_map.zig b/lib/std/array_hash_map.zig
index 4ca603d2e889bba5034c09d79ffc22e65c38b90e..37612a1266b5d446c0c1ea98062e369259461ba3 100644
--- a/lib/std/array_hash_map.zig
+++ b/lib/std/array_hash_map.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const debug = std.debug;
 const assert = debug.assert;
diff --git a/lib/std/array_list.zig b/lib/std/array_list.zig
index 1e74d34922a8c8610cbb69969f1cefdda6da0c69..f6ee5cdad26c19b730b933542c5047e2f0ce246f 100644
--- a/lib/std/array_list.zig
+++ b/lib/std/array_list.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const debug = std.debug;
 const assert = debug.assert;
diff --git a/lib/std/ascii.zig b/lib/std/ascii.zig
index afaf9f8ca473fe94359e517043d7c5d9aeef655b..c999162b3643378c068e5d3a259d67479a7b53ce 100644
--- a/lib/std/ascii.zig
+++ b/lib/std/ascii.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Does NOT look at the locale the way C89's toupper(3), isspace() et cetera does.
 // I could have taken only a u7 to make this clear, but it would be slower
 // It is my opinion that encodings other than UTF-8 should not be supported.
diff --git a/lib/std/atomic.zig b/lib/std/atomic.zig
index 42d57eb8fa105b97af96ad87020a376a688f95f6..95d218736a8270c93a6ea75a59483734ac4df67e 100644
--- a/lib/std/atomic.zig
+++ b/lib/std/atomic.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std.zig");
 const target = std.Target.current;
 
diff --git a/lib/std/atomic/Atomic.zig b/lib/std/atomic/Atomic.zig
index f4e3ebda9dfcdea36338e2efe8d2dee3062430e1..deb364b7d3d7390bcce0593e20fc14ca1159139b 100644
--- a/lib/std/atomic/Atomic.zig
+++ b/lib/std/atomic/Atomic.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../std.zig");
 
 const testing = std.testing;
diff --git a/lib/std/atomic/queue.zig b/lib/std/atomic/queue.zig
index cee431951c1b593555dcca7815c4e0a6c78ce160..f3781b4ce79268e7310ec6332b8f90c285242d13 100644
--- a/lib/std/atomic/queue.zig
+++ b/lib/std/atomic/queue.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const assert = std.debug.assert;
diff --git a/lib/std/atomic/stack.zig b/lib/std/atomic/stack.zig
index cfdf40fa60c21f1a3df1b80158870fee579e4ef0..a1747db0f5722485906da7564b335254de833b1b 100644
--- a/lib/std/atomic/stack.zig
+++ b/lib/std/atomic/stack.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const assert = std.debug.assert;
 const builtin = std.builtin;
 const expect = std.testing.expect;
diff --git a/lib/std/base64.zig b/lib/std/base64.zig
index 4b01455112dac67dff6a51b65173cf02282c859d..7e593900e6ce40ab11e93766e41bd374b926dc9c 100644
--- a/lib/std/base64.zig
+++ b/lib/std/base64.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const assert = std.debug.assert;
 const testing = std.testing;
diff --git a/lib/std/bit_set.zig b/lib/std/bit_set.zig
index 261c6af2dfa340b5d10bebf81b4ce330696c3412..dd8afb4168ea141435a10f5f63c89be4971fa293 100644
--- a/lib/std/bit_set.zig
+++ b/lib/std/bit_set.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! This file defines several variants of bit sets.  A bit set
 //! is a densely stored set of integers with a known maximum,
 //! in which each integer gets a single bit.  Bit sets have very
diff --git a/lib/std/bounded_array.zig b/lib/std/bounded_array.zig
index 33216969bf03cb78461f7c59e02a36864e554e56..587251458eacec25c8f76cefbaff8cf154ce93db 100644
--- a/lib/std/bounded_array.zig
+++ b/lib/std/bounded_array.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std.zig");
 const assert = std.debug.assert;
 const mem = std.mem;
diff --git a/lib/std/buf_map.zig b/lib/std/buf_map.zig
index 3494fce0323f670c38754e4b872e1633dc3b0c18..1e4462e6aee425b874af819967b7402043b73c56 100644
--- a/lib/std/buf_map.zig
+++ b/lib/std/buf_map.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const StringHashMap = std.StringHashMap;
 const mem = std.mem;
diff --git a/lib/std/buf_set.zig b/lib/std/buf_set.zig
index c2a1f9bcb97ddf1681cfb9c0e493c621e11d54f1..ce2d51b0569c76c39aa6997759c196ac1c02300a 100644
--- a/lib/std/buf_set.zig
+++ b/lib/std/buf_set.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const StringHashMap = std.StringHashMap;
 const mem = @import("mem.zig");
diff --git a/lib/std/build.zig b/lib/std/build.zig
index 013770bbece61ffb7ed699c8e3eb142d3ecb6d26..1533f93085965a3cc472cd7afd5bd53f51469d77 100644
--- a/lib/std/build.zig
+++ b/lib/std/build.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const builtin = std.builtin;
 const io = std.io;
diff --git a/lib/std/build/CheckFileStep.zig b/lib/std/build/CheckFileStep.zig
index 1f1ed0884ea2a1b33f7aaec466c6fb60dc09a541..2b433b5448cc9bdbc690a1592079d9ea9f59f792 100644
--- a/lib/std/build/CheckFileStep.zig
+++ b/lib/std/build/CheckFileStep.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const build = std.build;
 const Step = build.Step;
diff --git a/lib/std/build/FmtStep.zig b/lib/std/build/FmtStep.zig
index 82faf32be903ce5322f15e24a6f1eba6413c1dca..62923623f2aaea208be692355b6f7a651beddd99 100644
--- a/lib/std/build/FmtStep.zig
+++ b/lib/std/build/FmtStep.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const build = @import("../build.zig");
 const Step = build.Step;
diff --git a/lib/std/build/InstallRawStep.zig b/lib/std/build/InstallRawStep.zig
index 743b25f3cdeace469db52011c279f4c5235aa46c..39a2d29845542ce60d27c0848d9303caecb252ed 100644
--- a/lib/std/build/InstallRawStep.zig
+++ b/lib/std/build/InstallRawStep.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 
 const Allocator = std.mem.Allocator;
diff --git a/lib/std/build/RunStep.zig b/lib/std/build/RunStep.zig
index 89d9cd911cb25f84cc9d0b3ccd18f9479ae0a014..67929b6f5d6b0f62c397d97987cacbf057af50a2 100644
--- a/lib/std/build/RunStep.zig
+++ b/lib/std/build/RunStep.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const build = std.build;
diff --git a/lib/std/build/TranslateCStep.zig b/lib/std/build/TranslateCStep.zig
index 2f209b80b423699009cd86261def3eb50224c010..0d44ebd80a887fdca58b2bc27551e1228ffc3b8b 100644
--- a/lib/std/build/TranslateCStep.zig
+++ b/lib/std/build/TranslateCStep.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const build = std.build;
 const Step = build.Step;
diff --git a/lib/std/build/WriteFileStep.zig b/lib/std/build/WriteFileStep.zig
index 12879421103a1a6ae04d31d2d9765a3b2b5e0439..5a8d806049eb7bf5b63b8e50a530a229d43234ee 100644
--- a/lib/std/build/WriteFileStep.zig
+++ b/lib/std/build/WriteFileStep.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const build = @import("../build.zig");
 const Step = build.Step;
diff --git a/lib/std/builtin.zig b/lib/std/builtin.zig
index caf32890b6219f53f01219e1c9b8ad8e78698ec2..bb35d61375189e1b6e1f05d7bd5720c268300b18 100644
--- a/lib/std/builtin.zig
+++ b/lib/std/builtin.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 
 // These are all deprecated.
diff --git a/lib/std/c.zig b/lib/std/c.zig
index 700a1dc25090ed050cd39269b9a1179799aae52f..0ad69f873fdec96595e725522f5cf6ecc1826646 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = std.builtin;
 const page_size = std.mem.page_size;
diff --git a/lib/std/c/darwin.zig b/lib/std/c/darwin.zig
index 117172fc7b4e247edc77652c9d92b305327c05ba..7fa07719a8865849e547471fa3400c97a9c7b944 100644
--- a/lib/std/c/darwin.zig
+++ b/lib/std/c/darwin.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 const builtin = @import("builtin");
diff --git a/lib/std/c/dragonfly.zig b/lib/std/c/dragonfly.zig
index 7d722dad443737504bb3269aff8270e122cdaad2..e5786d2bd400e99fbfda93a0bf572a8fdffa25a7 100644
--- a/lib/std/c/dragonfly.zig
+++ b/lib/std/c/dragonfly.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 usingnamespace std.c;
 extern "c" threadlocal var errno: c_int;
diff --git a/lib/std/c/emscripten.zig b/lib/std/c/emscripten.zig
index 526eb9e99c1af0663af6e0b2f86f6c61117ad506..0d78d4d73f2756d2ea6213bd488becb2233fe8ef 100644
--- a/lib/std/c/emscripten.zig
+++ b/lib/std/c/emscripten.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const pthread_mutex_t = extern struct {
     size: [__SIZEOF_PTHREAD_MUTEX_T]u8 align(4) = [_]u8{0} ** __SIZEOF_PTHREAD_MUTEX_T,
 };
diff --git a/lib/std/c/freebsd.zig b/lib/std/c/freebsd.zig
index eb449165d34a296d1a0a3003025e5f3572312c1e..f7d1e07608dbc14bd002134403c7ad17aaa8c2a0 100644
--- a/lib/std/c/freebsd.zig
+++ b/lib/std/c/freebsd.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 usingnamespace std.c;
 
diff --git a/lib/std/c/fuchsia.zig b/lib/std/c/fuchsia.zig
index fc34f49d2249ccb20080fd1ba226c464cb97d32a..af6c4756b9eec3c35e750f70a8626e4788f9c6ce 100644
--- a/lib/std/c/fuchsia.zig
+++ b/lib/std/c/fuchsia.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const pthread_mutex_t = extern struct {
     size: [__SIZEOF_PTHREAD_MUTEX_T]u8 align(@alignOf(usize)) = [_]u8{0} ** __SIZEOF_PTHREAD_MUTEX_T,
 };
diff --git a/lib/std/c/haiku.zig b/lib/std/c/haiku.zig
index fcf99db57158126b13da0b84d90d59456431e452..be6c180bed059c854d234c28a78bcbafa141ec48 100644
--- a/lib/std/c/haiku.zig
+++ b/lib/std/c/haiku.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //
 const std = @import("../std.zig");
 const builtin = std.builtin;
diff --git a/lib/std/c/hermit.zig b/lib/std/c/hermit.zig
index a159395ab367b2393e3b5d08a7e02ddcff576669..ae13840e16568392d3e4cf513f4a267071592298 100644
--- a/lib/std/c/hermit.zig
+++ b/lib/std/c/hermit.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const pthread_mutex_t = extern struct {
     inner: usize = ~@as(usize, 0),
 };
diff --git a/lib/std/c/linux.zig b/lib/std/c/linux.zig
index 2ce98e2246c57b14c9ff1fe77d292abb100e45a0..808b05bd6db79352b0dd5dde6a41ba12eafef056 100644
--- a/lib/std/c/linux.zig
+++ b/lib/std/c/linux.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const maxInt = std.math.maxInt;
 const abi = std.Target.current.abi;
diff --git a/lib/std/c/minix.zig b/lib/std/c/minix.zig
index 3f03d31ed5473d7f7abf16258a1ac10c99d7c726..9c644a79867c892e05f67335872813d41c6e347d 100644
--- a/lib/std/c/minix.zig
+++ b/lib/std/c/minix.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 pub const pthread_mutex_t = extern struct {
     size: [__SIZEOF_PTHREAD_MUTEX_T]u8 align(@alignOf(usize)) = [_]u8{0} ** __SIZEOF_PTHREAD_MUTEX_T,
diff --git a/lib/std/c/netbsd.zig b/lib/std/c/netbsd.zig
index 07af1dc689855a05b95494ac44994f096065d3f7..e45dc85d34eb842ec31ef23384389a5043787a79 100644
--- a/lib/std/c/netbsd.zig
+++ b/lib/std/c/netbsd.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 
diff --git a/lib/std/c/openbsd.zig b/lib/std/c/openbsd.zig
index 15820fb0a935d8a482659c4078b61198215cfb1f..e5ded7f3fb837dedc1edccce56def2bfce25c21c 100644
--- a/lib/std/c/openbsd.zig
+++ b/lib/std/c/openbsd.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 
diff --git a/lib/std/c/solaris.zig b/lib/std/c/solaris.zig
index ed043018d0fd98b1e6e4d6bb2e9defb7e0b6a6cc..7c70a01fc4ac1c9281c6ad6476c61d959ddb2889 100644
--- a/lib/std/c/solaris.zig
+++ b/lib/std/c/solaris.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const pthread_mutex_t = extern struct {
     __pthread_mutex_flag1: u16 = 0,
     __pthread_mutex_flag2: u8 = 0,
diff --git a/lib/std/c/tokenizer.zig b/lib/std/c/tokenizer.zig
index f8709e12bea54e074e0f6a43f80fdfc08f64ef80..9ad5ab0179e972951442377dfd39b8f8b6829abe 100644
--- a/lib/std/c/tokenizer.zig
+++ b/lib/std/c/tokenizer.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const mem = std.mem;
 
diff --git a/lib/std/c/wasi.zig b/lib/std/c/wasi.zig
index 0edc77de3780e66bc72f6e6acbda7e40efffe735..339bdcd127f5b1a069a6ee372927e0dbe1d395f0 100644
--- a/lib/std/c/wasi.zig
+++ b/lib/std/c/wasi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("../os/bits.zig");
 
 extern threadlocal var errno: c_int;
diff --git a/lib/std/c/windows.zig b/lib/std/c/windows.zig
index bed2e421ff03093f6872a2b18cf0f2710b0dbbb7..a10715f0830e8e5e00e7603c90727cabe07cf09a 100644
--- a/lib/std/c/windows.zig
+++ b/lib/std/c/windows.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub extern "c" fn _errno() *c_int;
 
 pub extern "c" fn _msize(memblock: ?*c_void) usize;
diff --git a/lib/std/child_process.zig b/lib/std/child_process.zig
index 3f3fa9c754d0133bc75c96ab6c8d160f6e18eb1d..7d8881a67995b25a12f9271c09ae186d374dc182 100644
--- a/lib/std/child_process.zig
+++ b/lib/std/child_process.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const cstr = std.cstr;
 const unicode = std.unicode;
diff --git a/lib/std/coff.zig b/lib/std/coff.zig
index 8b00a2429702e62540536a412c55ca7cfe9d3959..6caf214728f51ebf37d5a1efe014d70852b9b045 100644
--- a/lib/std/coff.zig
+++ b/lib/std/coff.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = std.builtin;
 const std = @import("std.zig");
 const io = std.io;
diff --git a/lib/std/compress.zig b/lib/std/compress.zig
index 972031c182c871afa1e8d1037e3f611459122678..f4db3fecd5a6ec2b0f79e6b0ab45f59aa8e8871a 100644
--- a/lib/std/compress.zig
+++ b/lib/std/compress.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 
 pub const deflate = @import("compress/deflate.zig");
diff --git a/lib/std/compress/deflate.zig b/lib/std/compress/deflate.zig
index d7209981ce0ae6be0e62d2c56737bd2476abf90b..b443c2971f3ea56421f296d798fa91adfd91b76a 100644
--- a/lib/std/compress/deflate.zig
+++ b/lib/std/compress/deflate.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //
 // Decompressor for DEFLATE data streams (RFC1951)
 //
diff --git a/lib/std/compress/gzip.zig b/lib/std/compress/gzip.zig
index 6f17601949325701ffbfcc425a0e9e021bc23a1e..497b07d905e27c56e3a01ec4f8dbc47084419b46 100644
--- a/lib/std/compress/gzip.zig
+++ b/lib/std/compress/gzip.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //
 // Decompressor for GZIP data streams (RFC1952)
 
diff --git a/lib/std/compress/zlib.zig b/lib/std/compress/zlib.zig
index 909bae4090586296bd8bc6d4e61813a2244202a7..f0f4ca2ff4d91efe3f1743bb8531e3d49baa5423 100644
--- a/lib/std/compress/zlib.zig
+++ b/lib/std/compress/zlib.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //
 // Decompressor for ZLIB data streams (RFC1950)
 
diff --git a/lib/std/comptime_string_map.zig b/lib/std/comptime_string_map.zig
index 6e8f190bc48b1d05dff6fa80885720f027cb645c..09ba4e5a3caf571db2ea36062c842b5b61ff7b9f 100644
--- a/lib/std/comptime_string_map.zig
+++ b/lib/std/comptime_string_map.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const mem = std.mem;
 
diff --git a/lib/std/crypto.zig b/lib/std/crypto.zig
index 84b291d57ef03c9b4e16a0d95994c1dc547d34ff..e00e331b460721f56f4f6d8e62b4b8a1108e09d5 100644
--- a/lib/std/crypto.zig
+++ b/lib/std/crypto.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 /// Authenticated Encryption with Associated Data
 pub const aead = struct {
     pub const aegis = struct {
diff --git a/lib/std/crypto/25519/curve25519.zig b/lib/std/crypto/25519/curve25519.zig
index 9b8cecb917626740c180e2a5f1674c5cc914fa54..44a19362e4e3ebdab4f1f81e298aa63f68c0e1cd 100644
--- a/lib/std/crypto/25519/curve25519.zig
+++ b/lib/std/crypto/25519/curve25519.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const crypto = std.crypto;
 
diff --git a/lib/std/crypto/25519/ed25519.zig b/lib/std/crypto/25519/ed25519.zig
index 4940f0dee6cb83fc891dcf7cbb1afe4199a72fe6..a6ac956183af1180321591a574228f62da8a8362 100644
--- a/lib/std/crypto/25519/ed25519.zig
+++ b/lib/std/crypto/25519/ed25519.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const crypto = std.crypto;
 const debug = std.debug;
diff --git a/lib/std/crypto/25519/edwards25519.zig b/lib/std/crypto/25519/edwards25519.zig
index 15af616d602e79db9cabe9dc7bd99c9777c5708a..7e58692e63a5dad62e41cc3e17a0071ac8dfe303 100644
--- a/lib/std/crypto/25519/edwards25519.zig
+++ b/lib/std/crypto/25519/edwards25519.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const crypto = std.crypto;
 const debug = std.debug;
diff --git a/lib/std/crypto/25519/field.zig b/lib/std/crypto/25519/field.zig
index 1d67f0a902395db03eccc1a5a127bb43be8c2c83..277fb98d5cea11ae3175dee48e2f325b225c92fd 100644
--- a/lib/std/crypto/25519/field.zig
+++ b/lib/std/crypto/25519/field.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const crypto = std.crypto;
 const readIntLittle = std.mem.readIntLittle;
diff --git a/lib/std/crypto/25519/ristretto255.zig b/lib/std/crypto/25519/ristretto255.zig
index dea6193fca2e0e59f7dcc370ca0462546592bf23..e33bdb496d075844b57d726bc30553314e419ca3 100644
--- a/lib/std/crypto/25519/ristretto255.zig
+++ b/lib/std/crypto/25519/ristretto255.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const fmt = std.fmt;
 
diff --git a/lib/std/crypto/25519/scalar.zig b/lib/std/crypto/25519/scalar.zig
index bea054234efd95af644669a7fa1a0cd36c66d616..9582a888f0f91b2b0faf2c2f55babfab54065029 100644
--- a/lib/std/crypto/25519/scalar.zig
+++ b/lib/std/crypto/25519/scalar.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const mem = std.mem;
 
diff --git a/lib/std/crypto/25519/x25519.zig b/lib/std/crypto/25519/x25519.zig
index 5109fd7c2a95cffa4f8c8bc78f58142b8d81799f..d935513ab6ab8c97943a085bb7324f064ce2dcf2 100644
--- a/lib/std/crypto/25519/x25519.zig
+++ b/lib/std/crypto/25519/x25519.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const crypto = std.crypto;
 const mem = std.mem;
diff --git a/lib/std/crypto/aegis.zig b/lib/std/crypto/aegis.zig
index 194b6de8f5ceaf3456cc1699a242280c202dc53f..68062c537e2a1b9fe98e54938bba5dbd51ac7bdb 100644
--- a/lib/std/crypto/aegis.zig
+++ b/lib/std/crypto/aegis.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const mem = std.mem;
 const assert = std.debug.assert;
diff --git a/lib/std/crypto/aes.zig b/lib/std/crypto/aes.zig
index 7d6e0d1e84bf0e39b4c91fd27158b0f7a495157d..18bae3978ef770436c31da82135e79dd6b0d0411 100644
--- a/lib/std/crypto/aes.zig
+++ b/lib/std/crypto/aes.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../std.zig");
 const testing = std.testing;
 const builtin = std.builtin;
diff --git a/lib/std/crypto/aes/aesni.zig b/lib/std/crypto/aes/aesni.zig
index 7fbbaac7e8818657b7487fd68a8186425b4ab0ae..94c7f5efc6f6008dbf93ca794f9d83fbbc5083b7 100644
--- a/lib/std/crypto/aes/aesni.zig
+++ b/lib/std/crypto/aes/aesni.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../../std.zig");
 const mem = std.mem;
 const debug = std.debug;
diff --git a/lib/std/crypto/aes/armcrypto.zig b/lib/std/crypto/aes/armcrypto.zig
index 4d16b2f680114bd0b9f6a318839640b9474191c6..cee5b9bccbf7681cabbac8722b8c6be3fc79167d 100644
--- a/lib/std/crypto/aes/armcrypto.zig
+++ b/lib/std/crypto/aes/armcrypto.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../../std.zig");
 const mem = std.mem;
 const debug = std.debug;
diff --git a/lib/std/crypto/aes/soft.zig b/lib/std/crypto/aes/soft.zig
index 0d8a56679312de472eec0d979933e68dfdc89c44..bc9a994b95abd682a68bfebb2a476d0b555782ea 100644
--- a/lib/std/crypto/aes/soft.zig
+++ b/lib/std/crypto/aes/soft.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Based on Go stdlib implementation
 
 const std = @import("../../std.zig");
diff --git a/lib/std/crypto/aes_gcm.zig b/lib/std/crypto/aes_gcm.zig
index 492a1a5223c1a677ea3a73829394cfb0aabf3294..2d1cefaa3130cd0f601f54e1132227cafe9e2d6d 100644
--- a/lib/std/crypto/aes_gcm.zig
+++ b/lib/std/crypto/aes_gcm.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const assert = std.debug.assert;
 const builtin = std.builtin;
diff --git a/lib/std/crypto/aes_ocb.zig b/lib/std/crypto/aes_ocb.zig
index 6aaa7fc8cb2763cd17acf8123c9a24fc15b6cc1e..69c34afcdac1e7cfa8ed1aa276dff82eeeb2e9ac 100644
--- a/lib/std/crypto/aes_ocb.zig
+++ b/lib/std/crypto/aes_ocb.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const crypto = std.crypto;
 const aes = crypto.core.aes;
diff --git a/lib/std/crypto/bcrypt.zig b/lib/std/crypto/bcrypt.zig
index 7d56350664b54073a48e3f67c680038e57df26f8..d8c4d67453c7b55194a4bbb1917002df685e0056 100644
--- a/lib/std/crypto/bcrypt.zig
+++ b/lib/std/crypto/bcrypt.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const crypto = std.crypto;
 const debug = std.debug;
diff --git a/lib/std/crypto/benchmark.zig b/lib/std/crypto/benchmark.zig
index efaca227c13c2aa0b043bf1770f2cb677513625f..7d55b95a3f3dacd24cb862d3c12fc5c9d3658bd7 100644
--- a/lib/std/crypto/benchmark.zig
+++ b/lib/std/crypto/benchmark.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // zig run benchmark.zig --release-fast --zig-lib-dir ..
 
 const std = @import("../std.zig");
diff --git a/lib/std/crypto/blake2.zig b/lib/std/crypto/blake2.zig
index e0b9eff5b90b033d3cccdf29bf59aabd2d73912b..e2107dda56f667e9ecdcaf045c9f4d7bb9eb6da3 100644
--- a/lib/std/crypto/blake2.zig
+++ b/lib/std/crypto/blake2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const mem = std.mem;
 const math = std.math;
diff --git a/lib/std/crypto/blake3.zig b/lib/std/crypto/blake3.zig
index 75aba06da0c58f2592c2f04ccc265013baccad5e..6a2950645a3b300c50a2076c92884b5b3d7fc9ac 100644
--- a/lib/std/crypto/blake3.zig
+++ b/lib/std/crypto/blake3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Translated from BLAKE3 reference implementation.
 // Source: https://github.com/BLAKE3-team/BLAKE3
 
diff --git a/lib/std/crypto/chacha20.zig b/lib/std/crypto/chacha20.zig
index 592116ddd4acd62971252ad5ffbf2cca87f01b11..11496034a06f16d1374db4a3609128d668956285 100644
--- a/lib/std/crypto/chacha20.zig
+++ b/lib/std/crypto/chacha20.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Based on public domain Supercop by Daniel J. Bernstein
 
 const std = @import("../std.zig");
diff --git a/lib/std/crypto/ghash.zig b/lib/std/crypto/ghash.zig
index b9a7e48adc1ed85551212a535ca967caa0ffea0e..704ed367f049ce86d0a643016375ad434cae964d 100644
--- a/lib/std/crypto/ghash.zig
+++ b/lib/std/crypto/ghash.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //
 // Adapted from BearSSL's ctmul64 implementation originally written by Thomas Pornin <pornin@bolet.org>
 
diff --git a/lib/std/crypto/gimli.zig b/lib/std/crypto/gimli.zig
index 7aa67212e4ff479871777095192a38ac318edc6f..c2342137043d9e7a7fef7e43a2e76cc7d73de4c3 100644
--- a/lib/std/crypto/gimli.zig
+++ b/lib/std/crypto/gimli.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Gimli is a 384-bit permutation designed to achieve high security with high
 // performance across a broad range of platforms, including 64-bit Intel/AMD
 // server CPUs, 64-bit and 32-bit ARM smartphone CPUs, 32-bit ARM
diff --git a/lib/std/crypto/hkdf.zig b/lib/std/crypto/hkdf.zig
index 81c541231dd799d92e6915a6756dfdbf5e399a0d..8de3052a0b08417f4725bd98c5dbdf3f9e42c617 100644
--- a/lib/std/crypto/hkdf.zig
+++ b/lib/std/crypto/hkdf.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 const hmac = std.crypto.auth.hmac;
diff --git a/lib/std/crypto/hmac.zig b/lib/std/crypto/hmac.zig
index 12c4a53e0f3657211651521d0ada71c4d4d033d0..5ff37f8112e95048dddfdda36f6407bf2260d054 100644
--- a/lib/std/crypto/hmac.zig
+++ b/lib/std/crypto/hmac.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const crypto = std.crypto;
 const debug = std.debug;
diff --git a/lib/std/crypto/md5.zig b/lib/std/crypto/md5.zig
index ef9907d18b459cc5bde97b53db643a2bc2bd6d00..9306c222ed3dc80aa07417697bcba3574385a830 100644
--- a/lib/std/crypto/md5.zig
+++ b/lib/std/crypto/md5.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const mem = std.mem;
 const math = std.math;
diff --git a/lib/std/crypto/modes.zig b/lib/std/crypto/modes.zig
index 8848334dae7e3e0630ec6e9407a8f7041f657f98..d2df2ce15a4711278cec0952bd20158618b342db 100644
--- a/lib/std/crypto/modes.zig
+++ b/lib/std/crypto/modes.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Based on Go stdlib implementation
 
 const std = @import("../std.zig");
diff --git a/lib/std/crypto/pbkdf2.zig b/lib/std/crypto/pbkdf2.zig
index b3e2a32bf3088043b96b64eb3ab1abb74cb9dc58..b8f03bceb717934042dedf2da1b67e611bdb5233 100644
--- a/lib/std/crypto/pbkdf2.zig
+++ b/lib/std/crypto/pbkdf2.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const mem = std.mem;
 const maxInt = std.math.maxInt;
diff --git a/lib/std/crypto/pcurves/p256.zig b/lib/std/crypto/pcurves/p256.zig
index dcc97bcbe5edc9adaed1ffe6cd83f183df5036dd..02410a88590d26a4631be38966c1d2fb20639c28 100644
--- a/lib/std/crypto/pcurves/p256.zig
+++ b/lib/std/crypto/pcurves/p256.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const builtin = std.builtin;
 const crypto = std.crypto;
diff --git a/lib/std/crypto/pcurves/p256/field.zig b/lib/std/crypto/pcurves/p256/field.zig
index 15de1fe43e21ccec602804f8a3d34a8f5092201b..c36db58e87debe0d53198db6ce97eac8f6ebdf7f 100644
--- a/lib/std/crypto/pcurves/p256/field.zig
+++ b/lib/std/crypto/pcurves/p256/field.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const common = @import("../common.zig");
 
diff --git a/lib/std/crypto/pcurves/p256/scalar.zig b/lib/std/crypto/pcurves/p256/scalar.zig
index afdc3fb50201e7b20e2ed58385f54baeb7eb7cd5..265300a7a6bb04786fa022a3be26b57d612989b6 100644
--- a/lib/std/crypto/pcurves/p256/scalar.zig
+++ b/lib/std/crypto/pcurves/p256/scalar.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const builtin = std.builtin;
 const common = @import("../common.zig");
diff --git a/lib/std/crypto/pcurves/tests.zig b/lib/std/crypto/pcurves/tests.zig
index 6bd0ac43f2f1f336c2267b9a4c38a22fc7b0410c..0321d0574c4cdb4e290d8ed0dab86822a7c5491f 100644
--- a/lib/std/crypto/pcurves/tests.zig
+++ b/lib/std/crypto/pcurves/tests.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const fmt = std.fmt;
 const testing = std.testing;
diff --git a/lib/std/crypto/phc_encoding.zig b/lib/std/crypto/phc_encoding.zig
index 812c1d54ff019ece70661f47c50316c60078bbf2..56fa76b5c0f823c2486e3190baaa6f9c7a52f672 100644
--- a/lib/std/crypto/phc_encoding.zig
+++ b/lib/std/crypto/phc_encoding.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 // https://github.com/P-H-C/phc-string-format
 
 const std = @import("std");
diff --git a/lib/std/crypto/poly1305.zig b/lib/std/crypto/poly1305.zig
index e93afac859a693aa52f65b691f32f1eb0b504a98..4f16f66cd039df5c4107d624578c4f505f0ef9ea 100644
--- a/lib/std/crypto/poly1305.zig
+++ b/lib/std/crypto/poly1305.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const utils = std.crypto.utils;
 const mem = std.mem;
diff --git a/lib/std/crypto/salsa20.zig b/lib/std/crypto/salsa20.zig
index 55e4db13f0c41ea78c55cad9abf438ff87ade82e..45dad75a8f39f45a0e623c00ac0dc8e5382a92f3 100644
--- a/lib/std/crypto/salsa20.zig
+++ b/lib/std/crypto/salsa20.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const crypto = std.crypto;
 const debug = std.debug;
diff --git a/lib/std/crypto/scrypt.zig b/lib/std/crypto/scrypt.zig
index 8d8e227408c7917a06759dd2721a232eb37691d8..5dcba41531d6564844d1db2989cd0cf2449eaa05 100644
--- a/lib/std/crypto/scrypt.zig
+++ b/lib/std/crypto/scrypt.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 // https://tools.ietf.org/html/rfc7914
 // https://github.com/golang/crypto/blob/master/scrypt/scrypt.go
 
diff --git a/lib/std/crypto/sha1.zig b/lib/std/crypto/sha1.zig
index e167a5071067d87ecd7c0115c2e80d7a38cbd3b0..b464fb03f52afb856a831e780315d1531605a457 100644
--- a/lib/std/crypto/sha1.zig
+++ b/lib/std/crypto/sha1.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const mem = std.mem;
 const math = std.math;
diff --git a/lib/std/crypto/sha2.zig b/lib/std/crypto/sha2.zig
index eb0eccfa84c1d04abb59cf6a6ce9f75a0b9eb7d7..2d2a70c87f9be93519d3334086dfaab9e082fad0 100644
--- a/lib/std/crypto/sha2.zig
+++ b/lib/std/crypto/sha2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const mem = std.mem;
 const math = std.math;
diff --git a/lib/std/crypto/sha3.zig b/lib/std/crypto/sha3.zig
index a4637c7fd4df309f9b9953f9a213aca5b6092f3a..db8126d183d4f2f60448c179eecc245ad9f9af48 100644
--- a/lib/std/crypto/sha3.zig
+++ b/lib/std/crypto/sha3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const mem = std.mem;
 const math = std.math;
diff --git a/lib/std/crypto/siphash.zig b/lib/std/crypto/siphash.zig
index 3bed5d1086e6a8b2ac4fb2dd414a3a3d888f25e7..c984e04490a18b487280334b1fb87ae5686509fb 100644
--- a/lib/std/crypto/siphash.zig
+++ b/lib/std/crypto/siphash.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //
 // SipHash is a moderately fast pseudorandom function, returning a 64-bit or 128-bit tag for an arbitrary long input.
 //
diff --git a/lib/std/crypto/test.zig b/lib/std/crypto/test.zig
index b517fbecb16db92f1d87844737ea29d8b47d2111..656fa89cfebef84ddccc9c39955e3bacd1cfa5a0 100644
--- a/lib/std/crypto/test.zig
+++ b/lib/std/crypto/test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const testing = std.testing;
 const fmt = std.fmt;
diff --git a/lib/std/crypto/tlcsprng.zig b/lib/std/crypto/tlcsprng.zig
index 15a356d3d3bf2e075941eeeac5853241fb213edb..46960cc0907a723001356dc566cc9b11abf25388 100644
--- a/lib/std/crypto/tlcsprng.zig
+++ b/lib/std/crypto/tlcsprng.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! Thread-local cryptographically secure pseudo-random number generator.
 //! This file has public declarations that are intended to be used internally
 //! by the standard library; this namespace is not intended to be exposed
diff --git a/lib/std/cstr.zig b/lib/std/cstr.zig
index da7c646ddeec589d999429ad5875b13f5bcd7246..6de5672df3ba33f76d19da785821b5cd42e46ff6 100644
--- a/lib/std/cstr.zig
+++ b/lib/std/cstr.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const builtin = std.builtin;
 const debug = std.debug;
diff --git a/lib/std/debug.zig b/lib/std/debug.zig
index aa7a979f8ff851996f2760e42e3248401c527bb1..13f8a4a8372834f2abc94290e740b1cc82cea08e 100644
--- a/lib/std/debug.zig
+++ b/lib/std/debug.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const builtin = std.builtin;
 const math = std.math;
diff --git a/lib/std/dwarf.zig b/lib/std/dwarf.zig
index eb22dba7c03833d01ab36add7f44a0dc1cea46de..3a294c2dd36268dfbc513a9d0eae0772edbc72e0 100644
--- a/lib/std/dwarf.zig
+++ b/lib/std/dwarf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const builtin = std.builtin;
 const debug = std.debug;
diff --git a/lib/std/dwarf_bits.zig b/lib/std/dwarf_bits.zig
index 99e268beb7fa3f0277c3439bc308cbac14bcca80..a40fa8a2777312dd2447b2620124f0abdea1f48c 100644
--- a/lib/std/dwarf_bits.zig
+++ b/lib/std/dwarf_bits.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const TAG_padding = 0x00;
 pub const TAG_array_type = 0x01;
 pub const TAG_class_type = 0x02;
diff --git a/lib/std/dynamic_library.zig b/lib/std/dynamic_library.zig
index d1750ef761a0bb5c8a5d841e3b4a89baa2db14d5..bd07003bad8806c110f3a6deb2b5f787b9180fb6 100644
--- a/lib/std/dynamic_library.zig
+++ b/lib/std/dynamic_library.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = std.builtin;
 
 const std = @import("std.zig");
diff --git a/lib/std/elf.zig b/lib/std/elf.zig
index 6c90dff929127f53d923b2ab538c1fc4e68a54b9..69f04868e8c3d766a6cd0a63d0009289c2418bb9 100644
--- a/lib/std/elf.zig
+++ b/lib/std/elf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const io = std.io;
 const os = std.os;
diff --git a/lib/std/enums.zig b/lib/std/enums.zig
index 95c6fc7ec7eaa917d50f60cfc2f7203aafb8ab2d..cfcc8e4f1d2974b5195212bc56855959e4f8de20 100644
--- a/lib/std/enums.zig
+++ b/lib/std/enums.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! This module contains utilities and data structures for working with enums.
 
 const std = @import("std.zig");
diff --git a/lib/std/event.zig b/lib/std/event.zig
index cd4af07d646df1f6bca45552312a7738e4d46140..6e608b54f04b9d56bcb3ab83912bddd3df332aa8 100644
--- a/lib/std/event.zig
+++ b/lib/std/event.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const Channel = @import("event/channel.zig").Channel;
 pub const Future = @import("event/future.zig").Future;
 pub const Group = @import("event/group.zig").Group;
diff --git a/lib/std/event/batch.zig b/lib/std/event/batch.zig
index af7f293cff77270600c8ff66534ca91c485716a8..4165f88f486c354b87e128fa9aa57e7ad23bca1b 100644
--- a/lib/std/event/batch.zig
+++ b/lib/std/event/batch.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const testing = std.testing;
 
diff --git a/lib/std/event/channel.zig b/lib/std/event/channel.zig
index 3880d6e286f9d119a60fe62523505848fbfd9ca8..915681d4a6d49b1d06bf11d3663314e3c1073131 100644
--- a/lib/std/event/channel.zig
+++ b/lib/std/event/channel.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const assert = std.debug.assert;
diff --git a/lib/std/event/future.zig b/lib/std/event/future.zig
index 81326f3fb6870e026895a7158a784359405ac7c3..17a7c3050b0a5160a7d9521a7d7afa797972eb9e 100644
--- a/lib/std/event/future.zig
+++ b/lib/std/event/future.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 const testing = std.testing;
diff --git a/lib/std/event/group.zig b/lib/std/event/group.zig
index 1d12689affa68f96e0293fa426b25bea213b0bf4..dc200017a4769977b84f11bfd56b7e68d8a31ac1 100644
--- a/lib/std/event/group.zig
+++ b/lib/std/event/group.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const Lock = std.event.Lock;
diff --git a/lib/std/event/lock.zig b/lib/std/event/lock.zig
index c7aeff10662ab470a56eb40b2d82707381a8c263..eea6a31455aadd1d09bd28fee1a2a9f026c19c27 100644
--- a/lib/std/event/lock.zig
+++ b/lib/std/event/lock.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const assert = std.debug.assert;
diff --git a/lib/std/event/locked.zig b/lib/std/event/locked.zig
index c9303274a927bad03b9e6ed3d20d4a608b2e0304..e921803447c4740bea1a921b7950d29d00dac928 100644
--- a/lib/std/event/locked.zig
+++ b/lib/std/event/locked.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const Lock = std.event.Lock;
 
diff --git a/lib/std/event/loop.zig b/lib/std/event/loop.zig
index 9c8550d459d16ef06c8c12d0bfa5549590aef26f..50fb76ec9d11bd58995a7a0d998e10498c196f1e 100644
--- a/lib/std/event/loop.zig
+++ b/lib/std/event/loop.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const root = @import("root");
diff --git a/lib/std/event/rwlock.zig b/lib/std/event/rwlock.zig
index 3bd0c8603564d560d84bf50161014f624490f34d..43d41b860e842fa96a27a638b38eca9575d47d2d 100644
--- a/lib/std/event/rwlock.zig
+++ b/lib/std/event/rwlock.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const assert = std.debug.assert;
diff --git a/lib/std/event/rwlocked.zig b/lib/std/event/rwlocked.zig
index 0272ca39c7fa4009cb711e2b2b14a9e8bc75265c..9a569e8f1f97b44430fa976c1ae9fd752339fddb 100644
--- a/lib/std/event/rwlocked.zig
+++ b/lib/std/event/rwlocked.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const RwLock = std.event.RwLock;
 
diff --git a/lib/std/event/wait_group.zig b/lib/std/event/wait_group.zig
index dde01c61a3cf95a371f851711c74f1b399bd5b64..2275a06d08bbd2e286ef4c381dd1de1514db92fd 100644
--- a/lib/std/event/wait_group.zig
+++ b/lib/std/event/wait_group.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const Loop = std.event.Loop;
diff --git a/lib/std/fifo.zig b/lib/std/fifo.zig
index 8377fd13b5629bc638d5fdaa2ced2ecfc7dfeabd..93ef50b861a1b9677ccafec1f148f5eea72879f1 100644
--- a/lib/std/fifo.zig
+++ b/lib/std/fifo.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // FIFO of fixed size items
 // Usually used for e.g. byte buffers
 
diff --git a/lib/std/fmt.zig b/lib/std/fmt.zig
index a9895e270aabd71dbb024695daa71b7c98ca4399..dff9e893e3d331aa3dc5f33b11d5581204425006 100644
--- a/lib/std/fmt.zig
+++ b/lib/std/fmt.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const math = std.math;
 const assert = std.debug.assert;
diff --git a/lib/std/fmt/errol.zig b/lib/std/fmt/errol.zig
index a4f46e7f136a620e2a326b15c63827ae237bba8a..e697b7d42fa2f62bc7a3be13de6948290af6b62b 100644
--- a/lib/std/fmt/errol.zig
+++ b/lib/std/fmt/errol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const enum3 = @import("errol/enum3.zig").enum3;
 const enum3_data = @import("errol/enum3.zig").enum3_data;
diff --git a/lib/std/fmt/errol/enum3.zig b/lib/std/fmt/errol/enum3.zig
index db671b8d254b97379598b5009bcc2f118e13928c..c27753483d168ce07c0f79b64f6e310e9d76b3fd 100644
--- a/lib/std/fmt/errol/enum3.zig
+++ b/lib/std/fmt/errol/enum3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const enum3 = [_]u64{
     0x4e2e2785c3a2a20b,
     0x240a28877a09a4e1,
diff --git a/lib/std/fmt/errol/lookup.zig b/lib/std/fmt/errol/lookup.zig
index 4499d3fdefc81042e46d0cd31bc3e8c1f69cd87c..2fb6b167bb49c1eccd28bd95700e2e075f4e0bae 100644
--- a/lib/std/fmt/errol/lookup.zig
+++ b/lib/std/fmt/errol/lookup.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const HP = struct {
     val: f64,
     off: f64,
diff --git a/lib/std/fmt/parse_float.zig b/lib/std/fmt/parse_float.zig
index ed6224b4b91cdf54463af0ead693d12c5f4ba90e..585c23ed540c2421bbae9d737bbf50791e4e3d15 100644
--- a/lib/std/fmt/parse_float.zig
+++ b/lib/std/fmt/parse_float.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Adapted from https://github.com/grzegorz-kraszewski/stringtofloat.
 
 // MIT License
diff --git a/lib/std/fmt/parse_hex_float.zig b/lib/std/fmt/parse_hex_float.zig
index 042da605499bd2bde0b14c98cfbee145015d6135..45a289fdd25b4707159b79e6f4892bfed7e4527c 100644
--- a/lib/std/fmt/parse_hex_float.zig
+++ b/lib/std/fmt/parse_hex_float.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.const std = @import("std");
-//
 // The rounding logic is inspired by LLVM's APFloat and Go's atofHex
 // implementation.
 
diff --git a/lib/std/fs.zig b/lib/std/fs.zig
index cb33464dd2190f8d7aa1cf4caf8bbf5fe53a06e2..1e02c0e805cd46324d9ddd5f5e840ef65960ed39 100644
--- a/lib/std/fs.zig
+++ b/lib/std/fs.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const root = @import("root");
 const builtin = std.builtin;
 const std = @import("std.zig");
diff --git a/lib/std/fs/file.zig b/lib/std/fs/file.zig
index 147ecc7608612160024f8e4bc923adf3a56a9817..1dd5e8ba9890af583bcd4791276365f3dd138dae 100644
--- a/lib/std/fs/file.zig
+++ b/lib/std/fs/file.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const os = std.os;
diff --git a/lib/std/fs/get_app_data_dir.zig b/lib/std/fs/get_app_data_dir.zig
index 41b8e7311d8ecb9e520b511d784fca5379d7d038..fed1c85f39858b64370c009da3562cace81bd792 100644
--- a/lib/std/fs/get_app_data_dir.zig
+++ b/lib/std/fs/get_app_data_dir.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const unicode = std.unicode;
diff --git a/lib/std/fs/path.zig b/lib/std/fs/path.zig
index baaadcfe59dcc0715306a8b485977a24f2e51a28..efc896e6b73efc215c183b855cc3e22df489b545 100644
--- a/lib/std/fs/path.zig
+++ b/lib/std/fs/path.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const std = @import("../std.zig");
 const debug = std.debug;
diff --git a/lib/std/fs/test.zig b/lib/std/fs/test.zig
index 26abbe5158f1a3c29432d012bc15f85a52ae4998..0ce416454ba5fb56aedd1527760921a09542f5b8 100644
--- a/lib/std/fs/test.zig
+++ b/lib/std/fs/test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const testing = std.testing;
 const builtin = std.builtin;
diff --git a/lib/std/fs/wasi.zig b/lib/std/fs/wasi.zig
index 2bfc384773ce1ebff1b933dc8cc769118b509330..ad354e226f93e307f204f500a5cd809816d9d6dc 100644
--- a/lib/std/fs/wasi.zig
+++ b/lib/std/fs/wasi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const os = std.os;
 const mem = std.mem;
diff --git a/lib/std/fs/watch.zig b/lib/std/fs/watch.zig
index 40867bb3b570886b6a661b623e0826ee8fd08eb8..7777793b29bd0b4498cba7f01f93d44a1a16d985 100644
--- a/lib/std/fs/watch.zig
+++ b/lib/std/fs/watch.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = std.builtin;
 const event = std.event;
diff --git a/lib/std/hash.zig b/lib/std/hash.zig
index f5b94725e2cf8319b5da6ac5e47db8f010f12b9e..f96d331d0fde18e35de4c0392ae1f798ce73d99d 100644
--- a/lib/std/hash.zig
+++ b/lib/std/hash.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const adler = @import("hash/adler.zig");
 pub const Adler32 = adler.Adler32;
 
diff --git a/lib/std/hash/adler.zig b/lib/std/hash/adler.zig
index 61408e82ee76c613835aa95f776230f7e42834f7..78f52b539b2119d7681c5daf96556300e33efe91 100644
--- a/lib/std/hash/adler.zig
+++ b/lib/std/hash/adler.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Adler32 checksum.
 //
 // https://tools.ietf.org/html/rfc1950#section-9
diff --git a/lib/std/hash/auto_hash.zig b/lib/std/hash/auto_hash.zig
index 3375066c12233a9d88e4fbc63276580fc5db8bf7..4f037349baaaee990daf860b525a40ceb29a91f2 100644
--- a/lib/std/hash/auto_hash.zig
+++ b/lib/std/hash/auto_hash.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const assert = std.debug.assert;
 const mem = std.mem;
diff --git a/lib/std/hash/benchmark.zig b/lib/std/hash/benchmark.zig
index 5a86afa0569c707b1f3370b409ec13f35a6a85c7..b4952a926026ace769b405d7917ff090852a9423 100644
--- a/lib/std/hash/benchmark.zig
+++ b/lib/std/hash/benchmark.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // zig run benchmark.zig --release-fast --zig-lib-dir ..
 
 const builtin = std.builtin;
diff --git a/lib/std/hash/cityhash.zig b/lib/std/hash/cityhash.zig
index 8796eb00757dc652a79c730f4ecdeac9a06cf9ac..c6118c8cdcbcfd6db605ecd0180ee2dfee38919c 100644
--- a/lib/std/hash/cityhash.zig
+++ b/lib/std/hash/cityhash.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = std.builtin;
 
diff --git a/lib/std/hash/crc.zig b/lib/std/hash/crc.zig
index 597a0a4c75266c0d55afd6a85ed97c19ddce309a..0b7a9a7c517caca17634144b28d974ffd462b46e 100644
--- a/lib/std/hash/crc.zig
+++ b/lib/std/hash/crc.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // There are two implementations of CRC32 implemented with the following key characteristics:
 //
 // - Crc32WithPoly uses 8Kb of tables but is ~10x faster than the small method.
diff --git a/lib/std/hash/fnv.zig b/lib/std/hash/fnv.zig
index 7dadf5488ff069f48dd33367c3ca294779cca7c9..3175f26820120328acf71dcf156b7a57276c69f8 100644
--- a/lib/std/hash/fnv.zig
+++ b/lib/std/hash/fnv.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // FNV1a - Fowler-Noll-Vo hash function
 //
 // FNV1a is a fast, non-cryptographic hash function with fairly good distribution properties.
diff --git a/lib/std/hash/murmur.zig b/lib/std/hash/murmur.zig
index 2c6ec2bf1645ed29c2daa2584d712257fb1a6060..adb150446d3eaf5c8a6fb4f39978245d9956edbf 100644
--- a/lib/std/hash/murmur.zig
+++ b/lib/std/hash/murmur.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = @import("builtin");
 const testing = std.testing;
diff --git a/lib/std/hash/wyhash.zig b/lib/std/hash/wyhash.zig
index 83cd5e097c97f56632f6bec0b572d986911ed676..05340592a972d4f1db378c9f0613023b1663b694 100644
--- a/lib/std/hash/wyhash.zig
+++ b/lib/std/hash/wyhash.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const mem = std.mem;
 
diff --git a/lib/std/hash_map.zig b/lib/std/hash_map.zig
index 77d2df2efe6f81a0c5262969e9e6a79f35af5789..5f5321dd560c8ee1425a73781fa04e7c6e9af81a 100644
--- a/lib/std/hash_map.zig
+++ b/lib/std/hash_map.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const assert = debug.assert;
 const autoHash = std.hash.autoHash;
diff --git a/lib/std/heap.zig b/lib/std/heap.zig
index 088d6b39bbf772d0f79afe4ad1eba7a9068d996d..9032225b394c6c1b3ae9ad0f8843ab2eecdede6c 100644
--- a/lib/std/heap.zig
+++ b/lib/std/heap.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const root = @import("root");
 const debug = std.debug;
diff --git a/lib/std/heap/arena_allocator.zig b/lib/std/heap/arena_allocator.zig
index 356d5c5d8155cc12f32cd3baaa843a77c3877856..d61f66ce4a50968376063678517ba2b9789f7a31 100644
--- a/lib/std/heap/arena_allocator.zig
+++ b/lib/std/heap/arena_allocator.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 const mem = std.mem;
diff --git a/lib/std/heap/general_purpose_allocator.zig b/lib/std/heap/general_purpose_allocator.zig
index 006a41dae83e3e32b46d160bac6892d57c479422..d51c349be22d4a96e482f10ab59f1584b10a13ec 100644
--- a/lib/std/heap/general_purpose_allocator.zig
+++ b/lib/std/heap/general_purpose_allocator.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //! # General Purpose Allocator
 //!
 //! ## Design Priorities
diff --git a/lib/std/heap/log_to_writer_allocator.zig b/lib/std/heap/log_to_writer_allocator.zig
index c2fd687e0cc97b12369dd459a3c50bb5e4bd7e76..cf9c4162a74225935e69a62d3a9a566b8086aac2 100644
--- a/lib/std/heap/log_to_writer_allocator.zig
+++ b/lib/std/heap/log_to_writer_allocator.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const Allocator = std.mem.Allocator;
 
diff --git a/lib/std/heap/logging_allocator.zig b/lib/std/heap/logging_allocator.zig
index 7baa857f00f64235ff348d331dcfd623798ad7e6..5bd967b6965a444ecaf2978f26fb04d516d709aa 100644
--- a/lib/std/heap/logging_allocator.zig
+++ b/lib/std/heap/logging_allocator.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const Allocator = std.mem.Allocator;
 
diff --git a/lib/std/io.zig b/lib/std/io.zig
index 8bb9c4d2c09861e0dc2af10434c37d6740378ab4..4127a7b08b090b14972bd2a7d53b61676a0f26a5 100644
--- a/lib/std/io.zig
+++ b/lib/std/io.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const builtin = std.builtin;
 const root = @import("root");
diff --git a/lib/std/io/bit_reader.zig b/lib/std/io/bit_reader.zig
index 9092c8a62d766c32e35a54454bf28fb4098e38f2..cb123bacbfc566fa449e350cb4b1fd152e93b069 100644
--- a/lib/std/io/bit_reader.zig
+++ b/lib/std/io/bit_reader.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const io = std.io;
diff --git a/lib/std/io/bit_writer.zig b/lib/std/io/bit_writer.zig
index daa0718a18c46e2e1628fb88109e304742e6b050..5236e4965a08cd1ab1234aac09d8b8122a316234 100644
--- a/lib/std/io/bit_writer.zig
+++ b/lib/std/io/bit_writer.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const io = std.io;
diff --git a/lib/std/io/buffered_atomic_file.zig b/lib/std/io/buffered_atomic_file.zig
index 1aed190a47c5c931f5fb428f255a6caaf59867c8..5b27ba78f1a4a23486f33e41a8ad670c38a84d6a 100644
--- a/lib/std/io/buffered_atomic_file.zig
+++ b/lib/std/io/buffered_atomic_file.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const mem = std.mem;
 const fs = std.fs;
diff --git a/lib/std/io/buffered_reader.zig b/lib/std/io/buffered_reader.zig
index 16e6480037c0570c1d60fc77b63dd2483b069a71..b803e37602e685bfdcfc46ccb551a2bba0ee8eb4 100644
--- a/lib/std/io/buffered_reader.zig
+++ b/lib/std/io/buffered_reader.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const io = std.io;
 const assert = std.debug.assert;
diff --git a/lib/std/io/buffered_writer.zig b/lib/std/io/buffered_writer.zig
index 056ff08987f3160018d0613c4c89998b6e3010e1..77f556f2d2f0ea0c528ffcf276348703e25664e7 100644
--- a/lib/std/io/buffered_writer.zig
+++ b/lib/std/io/buffered_writer.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const io = std.io;
 
diff --git a/lib/std/io/c_writer.zig b/lib/std/io/c_writer.zig
index bbb7f1daf301a312ba2bc6de1cb427328c767d3d..758df71165a28867e306c266ec41d5c9205b28eb 100644
--- a/lib/std/io/c_writer.zig
+++ b/lib/std/io/c_writer.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const io = std.io;
diff --git a/lib/std/io/change_detection_stream.zig b/lib/std/io/change_detection_stream.zig
index 57ef8a82bd64fc3cf72227ea5f4216a238addf25..5ba2bb3c103b4b74a3719ef2671b76e3d6b620f9 100644
--- a/lib/std/io/change_detection_stream.zig
+++ b/lib/std/io/change_detection_stream.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../std.zig");
 const io = std.io;
 const mem = std.mem;
diff --git a/lib/std/io/counting_reader.zig b/lib/std/io/counting_reader.zig
index 3b06555deb98215c6366f3b0aaff1f88e1d26b4d..54e8e6f531a3a165d43917e79d07ec447564c277 100644
--- a/lib/std/io/counting_reader.zig
+++ b/lib/std/io/counting_reader.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const io = std.io;
 const testing = std.testing;
diff --git a/lib/std/io/counting_writer.zig b/lib/std/io/counting_writer.zig
index 28eddc1303b38bc3865bb6a9eebe5cccfbd49c7b..ee86c2a9b1e00f99eada4f043734267feb680efd 100644
--- a/lib/std/io/counting_writer.zig
+++ b/lib/std/io/counting_writer.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const io = std.io;
 const testing = std.testing;
diff --git a/lib/std/io/find_byte_writer.zig b/lib/std/io/find_byte_writer.zig
index db45114d3e4eb11731c431f33e08e414bafc1610..cb7efac2d9358969cac9cbdfe2c78af565f7627b 100644
--- a/lib/std/io/find_byte_writer.zig
+++ b/lib/std/io/find_byte_writer.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../std.zig");
 const io = std.io;
 const assert = std.debug.assert;
diff --git a/lib/std/io/fixed_buffer_stream.zig b/lib/std/io/fixed_buffer_stream.zig
index 8eb7c62a65f1d1fe4452a297664a16912febf84c..3623ef19896dcfb1ecee49e4b219aed02382713c 100644
--- a/lib/std/io/fixed_buffer_stream.zig
+++ b/lib/std/io/fixed_buffer_stream.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const io = std.io;
 const testing = std.testing;
diff --git a/lib/std/io/limited_reader.zig b/lib/std/io/limited_reader.zig
index 1647d5aac3de6fca43b136fdb93e001001b3b7d0..aa00af0d0925fa57b2447e5c9c7ae532d75b0c74 100644
--- a/lib/std/io/limited_reader.zig
+++ b/lib/std/io/limited_reader.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2020 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const io = std.io;
 const assert = std.debug.assert;
diff --git a/lib/std/io/multi_writer.zig b/lib/std/io/multi_writer.zig
index 9676212bbd1bf5b9f923399afa3d55bf2650f88e..ae683848d0dec625e9d5010972d09bbeca132fd2 100644
--- a/lib/std/io/multi_writer.zig
+++ b/lib/std/io/multi_writer.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const io = std.io;
 const testing = std.testing;
diff --git a/lib/std/io/peek_stream.zig b/lib/std/io/peek_stream.zig
index f3b8ba66457b80d9487fcb9de6eb9ff7954fb94b..c77052f975915849abdf9b7c00869632ab734974 100644
--- a/lib/std/io/peek_stream.zig
+++ b/lib/std/io/peek_stream.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const io = std.io;
 const mem = std.mem;
diff --git a/lib/std/io/reader.zig b/lib/std/io/reader.zig
index 0846b14650bd01431f65c580be95ec1ddfa5ac87..3e8eb8ec24d3c212657cec1bad79f329c15faf81 100644
--- a/lib/std/io/reader.zig
+++ b/lib/std/io/reader.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const math = std.math;
diff --git a/lib/std/io/seekable_stream.zig b/lib/std/io/seekable_stream.zig
index 4ba39fff4281930858ce61f736c13a853c40b428..1aa653dbe52cc6297c94b0422c35c74b46515b6c 100644
--- a/lib/std/io/seekable_stream.zig
+++ b/lib/std/io/seekable_stream.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 
 pub fn SeekableStream(
diff --git a/lib/std/io/stream_source.zig b/lib/std/io/stream_source.zig
index 1496c031bca7bc65dea49f508a3bb8bcd2e88c57..06903b2977edd6429995d16b5c5ae7434a069ca7 100644
--- a/lib/std/io/stream_source.zig
+++ b/lib/std/io/stream_source.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const io = std.io;
 
diff --git a/lib/std/io/test.zig b/lib/std/io/test.zig
index c04da72230f5934dc8b223e8eb802055e104f884..f5cdbc279244fca7b6295ae106a4cecc083edb49 100644
--- a/lib/std/io/test.zig
+++ b/lib/std/io/test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = @import("builtin");
 const io = std.io;
diff --git a/lib/std/io/writer.zig b/lib/std/io/writer.zig
index 6f9386b8de137daa77a273cad7d7bf1a0ca38e47..4f809dcca593b28136cd374dcdac4eb758bf1188 100644
--- a/lib/std/io/writer.zig
+++ b/lib/std/io/writer.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 const builtin = std.builtin;
diff --git a/lib/std/json.zig b/lib/std/json.zig
index 656c91c08021952edd4474f835b06f6db62d90fa..ce9ed9af7db9e479cdecb15e505a190d86c37545 100644
--- a/lib/std/json.zig
+++ b/lib/std/json.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // JSON parser conforming to RFC8259.
 //
 // https://tools.ietf.org/html/rfc8259
diff --git a/lib/std/json/test.zig b/lib/std/json/test.zig
index 027f6acacaa4b4d811cc9850da94d979564832a1..c13d6b84170687df67003dfbe1842dac6078030c 100644
--- a/lib/std/json/test.zig
+++ b/lib/std/json/test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // RFC 8529 conformance tests.
 //
 // Tests are taken from https://github.com/nst/JSONTestSuite
diff --git a/lib/std/json/write_stream.zig b/lib/std/json/write_stream.zig
index c9169be755e59f957e84b1ccb5f9ef9f0fae79cf..61da6ec49be09576195cca51e7a6b458c3395a35 100644
--- a/lib/std/json/write_stream.zig
+++ b/lib/std/json/write_stream.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 const maxInt = std.math.maxInt;
diff --git a/lib/std/leb128.zig b/lib/std/leb128.zig
index 6535c867f89f88b4d912331dccda141ce1fcfc12..c908b56f694bf2fa0967d1e34ea37c7a2b8e4f36 100644
--- a/lib/std/leb128.zig
+++ b/lib/std/leb128.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const testing = std.testing;
 
diff --git a/lib/std/linked_list.zig b/lib/std/linked_list.zig
index 7bab3e21886b094db209a4a28696a8b65ac9cc95..5039e16583ca06d53955612c311fe9d4aab1737c 100644
--- a/lib/std/linked_list.zig
+++ b/lib/std/linked_list.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const debug = std.debug;
 const assert = debug.assert;
diff --git a/lib/std/log.zig b/lib/std/log.zig
index 1b3095e0ee1621113082cb88696c2a45b1bb54ed..02c209c68037ffe7fc39ad7cc79d31b26b606b0e 100644
--- a/lib/std/log.zig
+++ b/lib/std/log.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! std.log is a standardized interface for logging which allows for the logging
 //! of programs and libraries using this interface to be formatted and filtered
 //! by the implementer of the root.log function.
diff --git a/lib/std/macho.zig b/lib/std/macho.zig
index 14be755a7000ad53378d3756d580230804e7584f..3c41b65522a8f4c66650a6c4aaa1ca77a14d296d 100644
--- a/lib/std/macho.zig
+++ b/lib/std/macho.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const mach_header = extern struct {
     magic: u32,
     cputype: cpu_type_t,
diff --git a/lib/std/math.zig b/lib/std/math.zig
index 55ef506366c88e2556edd6204c356601a0c503bd..01cd68e0edf73478fc7b72c45fd123d78addac5a 100644
--- a/lib/std/math.zig
+++ b/lib/std/math.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const assert = std.debug.assert;
 const mem = std.mem;
diff --git a/lib/std/math/acos.zig b/lib/std/math/acos.zig
index 5e3a289691f907a7aaeed6f841dbf0c1efd4b65c..b90ba9c78ee617042219dc862cf8baa4a6cffc21 100644
--- a/lib/std/math/acos.zig
+++ b/lib/std/math/acos.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/acosh.zig b/lib/std/math/acosh.zig
index 5e596a7bb077c102cc31598cff2a55942ecb5a65..e42f4fd5d3ebb274bc463845b3e22c32bdf5796d 100644
--- a/lib/std/math/acosh.zig
+++ b/lib/std/math/acosh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/asin.zig b/lib/std/math/asin.zig
index 16560a12cd35f4d88296f9715bbde84a1d6de988..0849fac72e1e6fdd1a70a54cb3843750ed84ba68 100644
--- a/lib/std/math/asin.zig
+++ b/lib/std/math/asin.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/asinh.zig b/lib/std/math/asinh.zig
index 2855a73eb8dadbd2decac0c269c12aedf2c7969f..71f7533b8924cb8065f3e657726bf4e4b64d1157 100644
--- a/lib/std/math/asinh.zig
+++ b/lib/std/math/asinh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/atan.zig b/lib/std/math/atan.zig
index bbfaa22b13061c0282f596a131e5e6166ebde35e..c67e6fe8e0927f2dc274ed7fc71f7c5230c7e53e 100644
--- a/lib/std/math/atan.zig
+++ b/lib/std/math/atan.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/atan2.zig b/lib/std/math/atan2.zig
index 21f6b95b8b9b21ead40c361b3987f0193473834d..d440d65e0458c4da69d2f7cdc3806fa964bab344 100644
--- a/lib/std/math/atan2.zig
+++ b/lib/std/math/atan2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/atanh.zig b/lib/std/math/atanh.zig
index 68824cea7a6882da7f6d4b28f8d95aeeee0356dd..2c27234cd273d837da8cacff9d8f6312c53a5a09 100644
--- a/lib/std/math/atanh.zig
+++ b/lib/std/math/atanh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/big.zig b/lib/std/math/big.zig
index 8ae214c666a6a6f6ad68e0754efa33908466554e..8c0f7f5e1ed9b436be7102c95895e796b997a4cf 100644
--- a/lib/std/math/big.zig
+++ b/lib/std/math/big.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 
diff --git a/lib/std/math/big/int.zig b/lib/std/math/big/int.zig
index cbae123189c116f0d9972e534da590c2be9a0e80..e289520e5790adfa0c659183a6dd5d12e461870b 100644
--- a/lib/std/math/big/int.zig
+++ b/lib/std/math/big/int.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const math = std.math;
 const Limb = std.math.big.Limb;
diff --git a/lib/std/math/big/int_test.zig b/lib/std/math/big/int_test.zig
index f4b294245aa776d6cc2313aac856c94776f862c9..757f994f7e4e503bc106745ca7ecb83c9161c172 100644
--- a/lib/std/math/big/int_test.zig
+++ b/lib/std/math/big/int_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const mem = std.mem;
 const testing = std.testing;
diff --git a/lib/std/math/big/rational.zig b/lib/std/math/big/rational.zig
index 8b7c2d45d627bbd60397bcf7a5f24d173deaf8e6..64f444eecafec10e90f5f735cdf314d2cf99791d 100644
--- a/lib/std/math/big/rational.zig
+++ b/lib/std/math/big/rational.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const debug = std.debug;
 const math = std.math;
diff --git a/lib/std/math/cbrt.zig b/lib/std/math/cbrt.zig
index 504657894d982037249fb2c5289554bf341d805f..1ff1818e8def3da0ed039dae3c8460d4a49cc71a 100644
--- a/lib/std/math/cbrt.zig
+++ b/lib/std/math/cbrt.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/ceil.zig b/lib/std/math/ceil.zig
index 77d3218c2409a1daaed7ebd4e453ea95cbbb6d91..fbac2561662d36299be1bcf17ebfa741670e1ec4 100644
--- a/lib/std/math/ceil.zig
+++ b/lib/std/math/ceil.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/complex.zig b/lib/std/math/complex.zig
index 7d37fcca5ba2e03084fd4e7b0554bf34161ee87c..3ae880f7c09a817c8bb11fafd384dea33a1dad6b 100644
--- a/lib/std/math/complex.zig
+++ b/lib/std/math/complex.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/abs.zig b/lib/std/math/complex/abs.zig
index 6890d15f8ac1a55df27963c12c51e0e9bcf7850c..87163605356d13ea2ffd095861220f37148bb0aa 100644
--- a/lib/std/math/complex/abs.zig
+++ b/lib/std/math/complex/abs.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/acos.zig b/lib/std/math/complex/acos.zig
index 3d02ad63588bc2362e697575de865f5e493f2111..12aec799e67db8196de0a01ccca55f6353461da2 100644
--- a/lib/std/math/complex/acos.zig
+++ b/lib/std/math/complex/acos.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/acosh.zig b/lib/std/math/complex/acosh.zig
index c239936d47f91537e13076dfe585d1f3bb5c1b9f..6f20e4dda27fb09d941d92244f283fe6d7250489 100644
--- a/lib/std/math/complex/acosh.zig
+++ b/lib/std/math/complex/acosh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/arg.zig b/lib/std/math/complex/arg.zig
index 8a79daa0732791e6b640b1f2e5c0cf7c9885e769..b2e960ae3e3af6d7d8032e2ce13a2df97ed98fcc 100644
--- a/lib/std/math/complex/arg.zig
+++ b/lib/std/math/complex/arg.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/asin.zig b/lib/std/math/complex/asin.zig
index f2c377df5686e7ee602ccf1f1228876d2274f886..e4b97c693dbe746ce50c37c2b049d66bef4e9998 100644
--- a/lib/std/math/complex/asin.zig
+++ b/lib/std/math/complex/asin.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/asinh.zig b/lib/std/math/complex/asinh.zig
index b1083c81bf98a879b57930f30af9319fbaa53176..bd1b8ee016b3741cabf6d3d55ec9fee59bb80386 100644
--- a/lib/std/math/complex/asinh.zig
+++ b/lib/std/math/complex/asinh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/atan.zig b/lib/std/math/complex/atan.zig
index 4550edd9655c0ebedb50b5ce2d81ef5f6f97cdbb..484b41edf5344d02a8ce0e2a1329f923ca259333 100644
--- a/lib/std/math/complex/atan.zig
+++ b/lib/std/math/complex/atan.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/complex/atanh.zig b/lib/std/math/complex/atanh.zig
index 41232570b5ef04be86b03c26b29a6ae5ab82ba76..01ddf7a9025d571c9ff18971417c5caf7b1e4bfa 100644
--- a/lib/std/math/complex/atanh.zig
+++ b/lib/std/math/complex/atanh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/conj.zig b/lib/std/math/complex/conj.zig
index ea4ba7356c095e667de76efc8139308e54b91c41..7427e44caa3867eb374317b30dfb00a442385408 100644
--- a/lib/std/math/complex/conj.zig
+++ b/lib/std/math/complex/conj.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/cos.zig b/lib/std/math/complex/cos.zig
index 0760485bb05b3c163dcc46f1aea12fd33ca38341..1c470c44c12c9398c2db1af01cba19826afd10aa 100644
--- a/lib/std/math/complex/cos.zig
+++ b/lib/std/math/complex/cos.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/cosh.zig b/lib/std/math/complex/cosh.zig
index 2a3673d4d10c2548d810906587c21affa97079ba..46f7a714a23aa94adfe46963c3e7be45e827d939 100644
--- a/lib/std/math/complex/cosh.zig
+++ b/lib/std/math/complex/cosh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/complex/exp.zig b/lib/std/math/complex/exp.zig
index 80fa837ab04e763c2c698a6ec0f8e29a22e9a228..f2ae28d3fd7a950b9397af1cbf9953c1b4ddc110 100644
--- a/lib/std/math/complex/exp.zig
+++ b/lib/std/math/complex/exp.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/complex/ldexp.zig b/lib/std/math/complex/ldexp.zig
index c0a6c7a934a6ef4d119e91caf544ff8a3a05c8a7..db710a043869ee4875fc8dc38d2924a3f7c429f1 100644
--- a/lib/std/math/complex/ldexp.zig
+++ b/lib/std/math/complex/ldexp.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/complex/log.zig b/lib/std/math/complex/log.zig
index e59870d556bef18c391e15b97a4c099190ed4f5a..90c51058cffeb8ec14b97c609428c36bcecdf195 100644
--- a/lib/std/math/complex/log.zig
+++ b/lib/std/math/complex/log.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/pow.zig b/lib/std/math/complex/pow.zig
index 092c8c2422c3d9d5ed5e0298ba078993ec78a006..36c6796431d3f319bf23fd88bc232b2b966ba6d5 100644
--- a/lib/std/math/complex/pow.zig
+++ b/lib/std/math/complex/pow.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/proj.zig b/lib/std/math/complex/proj.zig
index 8527be2293fbfd34cfb8426bfc4b489dc80a6e73..1e4b13f0df8ae9cc8a0569ca2e0c064c34a25edf 100644
--- a/lib/std/math/complex/proj.zig
+++ b/lib/std/math/complex/proj.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/sin.zig b/lib/std/math/complex/sin.zig
index 39b5f584ac8415d69046fc150639c391904664f2..7fa3fcf923f917724900f4a41dc04f0349da7962 100644
--- a/lib/std/math/complex/sin.zig
+++ b/lib/std/math/complex/sin.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/sinh.zig b/lib/std/math/complex/sinh.zig
index 05d1d11bd2f4b3934bee371ddb1f57fd9b29ce87..ed344999ee164a5743b083b9df9f5854d4a695bf 100644
--- a/lib/std/math/complex/sinh.zig
+++ b/lib/std/math/complex/sinh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/complex/sqrt.zig b/lib/std/math/complex/sqrt.zig
index 07fed152fab63773e988f6818f9ff37177b850ac..4f16e631b836971922153b9b916ffce219734d88 100644
--- a/lib/std/math/complex/sqrt.zig
+++ b/lib/std/math/complex/sqrt.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/complex/tan.zig b/lib/std/math/complex/tan.zig
index 0ee34dfcc22b5b6a7cb021cd203303dda32f0c4a..9e1025f74f6bb2d23adc30cb952eff593a517fa0 100644
--- a/lib/std/math/complex/tan.zig
+++ b/lib/std/math/complex/tan.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/math/complex/tanh.zig b/lib/std/math/complex/tanh.zig
index 51dbc0fa90d2b7fc4fa06799ab493e3ffceea786..0960c66679a80a4e443bfead4efba8aec5dc756b 100644
--- a/lib/std/math/complex/tanh.zig
+++ b/lib/std/math/complex/tanh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/copysign.zig b/lib/std/math/copysign.zig
index 47065fedaddd716720f546a7ea05928c9ef3055d..72057c190dc81430b950313009c4bd23ba0a3190 100644
--- a/lib/std/math/copysign.zig
+++ b/lib/std/math/copysign.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/cos.zig b/lib/std/math/cos.zig
index 8033b46692ba2a692b25e3a1cc077df4f9594d43..fad524fc88c47c29726864a5ea34298029791c0b 100644
--- a/lib/std/math/cos.zig
+++ b/lib/std/math/cos.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from go, which is licensed under a BSD-3 license.
 // https://golang.org/LICENSE
 //
diff --git a/lib/std/math/cosh.zig b/lib/std/math/cosh.zig
index f252aea805d4e1f0740562a7d191c5171b85da66..c71e82ea1c710cedd52acc1c5eab0005f61e127f 100644
--- a/lib/std/math/cosh.zig
+++ b/lib/std/math/cosh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/epsilon.zig b/lib/std/math/epsilon.zig
index 61758f1ee035970bd31191e6feb9989a57b95cf2..de0297ee630b26f2fc9ec86f3a7328befec4adb4 100644
--- a/lib/std/math/epsilon.zig
+++ b/lib/std/math/epsilon.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const math = @import("../math.zig");
 
 /// Returns the machine epsilon for type T.
diff --git a/lib/std/math/exp.zig b/lib/std/math/exp.zig
index 43da387e46fd96a489416ee3d25c041598b206b6..384c4efab4bdcbf4d40c4994c565a7a93dac42c3 100644
--- a/lib/std/math/exp.zig
+++ b/lib/std/math/exp.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/exp2.zig b/lib/std/math/exp2.zig
index e01c997dd765f9063e7d4904934c6f293ef9ecb4..502a305854abe9391312f7b69a6a7e2f263b5d0b 100644
--- a/lib/std/math/exp2.zig
+++ b/lib/std/math/exp2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/expm1.zig b/lib/std/math/expm1.zig
index ebc76165bac9e179d9dbf4ac92bbdef6df2b131b..5911edf36f98b4866ed845119927153b4b155b73 100644
--- a/lib/std/math/expm1.zig
+++ b/lib/std/math/expm1.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/expo2.zig b/lib/std/math/expo2.zig
index b88d4c2236a59c1a3a863fe1b6fd9bd5c817a899..f404570fb6928095d708f35804385f283c86634c 100644
--- a/lib/std/math/expo2.zig
+++ b/lib/std/math/expo2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/fabs.zig b/lib/std/math/fabs.zig
index 0b3c800b1238dbcc704b352c5f4118c2a6c74213..1221db2390328e9b21c63808ce33e205fc3c8e16 100644
--- a/lib/std/math/fabs.zig
+++ b/lib/std/math/fabs.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/floor.zig b/lib/std/math/floor.zig
index e4855bc0715f81efd9a8b491ce9e8123c5939835..c5ddb9e1441c09ee9f3a35cb3df57fb350d2e88d 100644
--- a/lib/std/math/floor.zig
+++ b/lib/std/math/floor.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/fma.zig b/lib/std/math/fma.zig
index 0bc3271e36c3056dc5b1bb0309c27e5968baac35..ea6e15538f454406398bce48e4258b03f0b1b00a 100644
--- a/lib/std/math/fma.zig
+++ b/lib/std/math/fma.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/frexp.zig b/lib/std/math/frexp.zig
index 4f3a03b0bc3ae7268c00de9a2aded5b080ffeb2c..f0d0c57af50ac0106d26125a1a3c3a910befcc8c 100644
--- a/lib/std/math/frexp.zig
+++ b/lib/std/math/frexp.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/hypot.zig b/lib/std/math/hypot.zig
index 4c2c6f1d8a0e36140c46f0a1006e0b475de39a39..e47a1918928d758e5129ee08ed9d40c69bd83033 100644
--- a/lib/std/math/hypot.zig
+++ b/lib/std/math/hypot.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/ilogb.zig b/lib/std/math/ilogb.zig
index deafeda7ce899b67d0aca1656f1d53e1ed64029f..e8fc56d1f8ebde2a0deb7b88300744933a722d07 100644
--- a/lib/std/math/ilogb.zig
+++ b/lib/std/math/ilogb.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/inf.zig b/lib/std/math/inf.zig
index 5011193e952770bbf5ac36feee41077ec387c23a..86ff2455332ed188f7a9f9d4fbb6e5d598afa810 100644
--- a/lib/std/math/inf.zig
+++ b/lib/std/math/inf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const math = std.math;
 
diff --git a/lib/std/math/isfinite.zig b/lib/std/math/isfinite.zig
index 68aec258b0d00a35c2ba1fac59fb844fe9367fc1..762fb399910ac5ade4e6fcbe11a66e7e907e9584 100644
--- a/lib/std/math/isfinite.zig
+++ b/lib/std/math/isfinite.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const math = std.math;
 const expect = std.testing.expect;
diff --git a/lib/std/math/isinf.zig b/lib/std/math/isinf.zig
index 792e6b38f344d96af97d21222e7451f7d2757d6b..cadaa8d937c5fe0b3f7348a036bcb5983ec160b0 100644
--- a/lib/std/math/isinf.zig
+++ b/lib/std/math/isinf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const math = std.math;
 const expect = std.testing.expect;
diff --git a/lib/std/math/isnan.zig b/lib/std/math/isnan.zig
index cf598322e5cd3d057edb99332640727dd45239db..f28eb9ce8dbee6b21cc7c53dcf4ac376aef10ba5 100644
--- a/lib/std/math/isnan.zig
+++ b/lib/std/math/isnan.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const math = std.math;
 const expect = std.testing.expect;
diff --git a/lib/std/math/isnormal.zig b/lib/std/math/isnormal.zig
index f3942d121c0ed2020ced0f92bf6d596fc437fffc..0430e1367a39602b27b9e91d037e21ae1a74ff3f 100644
--- a/lib/std/math/isnormal.zig
+++ b/lib/std/math/isnormal.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const math = std.math;
 const expect = std.testing.expect;
diff --git a/lib/std/math/ln.zig b/lib/std/math/ln.zig
index f85571fe34099e2ab03c90b4ba8493574fc310ec..d2a5ae807ed481b71b05ffdb726c10d053ddca58 100644
--- a/lib/std/math/ln.zig
+++ b/lib/std/math/ln.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/log.zig b/lib/std/math/log.zig
index bf170aa95b6912ff202e213ec5497129d658479c..cab652c62087964b03731b2200066447784f4c32 100644
--- a/lib/std/math/log.zig
+++ b/lib/std/math/log.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/log10.zig b/lib/std/math/log10.zig
index 56e4afbab6168d6efa22fad02a7a39f023706a51..19602fb4a2563262840ca92fa5900ce8e4bc4c72 100644
--- a/lib/std/math/log10.zig
+++ b/lib/std/math/log10.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/log1p.zig b/lib/std/math/log1p.zig
index f844332818337e26bb9aa2764e8f9a997272984c..e186b2795a4adebef7dc2172e4a569065e3fe4c1 100644
--- a/lib/std/math/log1p.zig
+++ b/lib/std/math/log1p.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/log2.zig b/lib/std/math/log2.zig
index 1a42404fea4424c387aae49194a12fb61c3f94d9..fca941c49a0ef600546d84fde3104cb542a4f973 100644
--- a/lib/std/math/log2.zig
+++ b/lib/std/math/log2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/modf.zig b/lib/std/math/modf.zig
index 2a8cf00bbb7c6ed81bd65dcaeba413b8bb5f5fc8..d12c49772981e7b5dedecb83dc4f442338bcba67 100644
--- a/lib/std/math/modf.zig
+++ b/lib/std/math/modf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/nan.zig b/lib/std/math/nan.zig
index 98051b155aef6610529673766490c53c4e45f257..5a01a5b3bdac95593a334f3d6cb5029ef68b2565 100644
--- a/lib/std/math/nan.zig
+++ b/lib/std/math/nan.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const math = @import("../math.zig");
 
 /// Returns the nan representation for type T.
diff --git a/lib/std/math/pow.zig b/lib/std/math/pow.zig
index 732d716dff5e16844a6ad494ca6c26c2696b95eb..040abf9a4484febd6bdd3513b4e1cd6cf861789a 100644
--- a/lib/std/math/pow.zig
+++ b/lib/std/math/pow.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from go, which is licensed under a BSD-3 license.
 // https://golang.org/LICENSE
 //
diff --git a/lib/std/math/powi.zig b/lib/std/math/powi.zig
index ff7f44f4835d3a37a35f4bec9fef50960e349762..6c4b3a65f4e65288e2f5563d2ce952bd5344568f 100644
--- a/lib/std/math/powi.zig
+++ b/lib/std/math/powi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Based on Rust, which is licensed under the MIT license.
 // https://github.com/rust-lang/rust/blob/360432f1e8794de58cd94f34c9c17ad65871e5b5/LICENSE-MIT
 //
diff --git a/lib/std/math/round.zig b/lib/std/math/round.zig
index 863752a3f59c807a35b7ce66f173330d5e32be08..7e1ee1ebd1c39026ab4aaf5ef7e0b057a9dac135 100644
--- a/lib/std/math/round.zig
+++ b/lib/std/math/round.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/scalbn.zig b/lib/std/math/scalbn.zig
index bdf382a303f03069954fd461706d5dba452c340c..30494c820a7192da923f58c7236fab062ba1debf 100644
--- a/lib/std/math/scalbn.zig
+++ b/lib/std/math/scalbn.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/signbit.zig b/lib/std/math/signbit.zig
index a1f2f127d4647cf9e94cfe32e124a217bcd78c1a..056add5ae6d8d8eebece47a93c70f69dd6cd03d6 100644
--- a/lib/std/math/signbit.zig
+++ b/lib/std/math/signbit.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const math = std.math;
 const expect = std.testing.expect;
diff --git a/lib/std/math/sin.zig b/lib/std/math/sin.zig
index 83cccfe8bffec25194b62db08c592b9ba416dcc5..4754e9502b2a140453e2ec5cc7139f89140e413f 100644
--- a/lib/std/math/sin.zig
+++ b/lib/std/math/sin.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from go, which is licensed under a BSD-3 license.
 // https://golang.org/LICENSE
 //
diff --git a/lib/std/math/sinh.zig b/lib/std/math/sinh.zig
index 5a38e83ba9609a0ff62790c8baee8cedaf52024e..5ec47fa3b587baa954c721d6fa5f77952e0705f3 100644
--- a/lib/std/math/sinh.zig
+++ b/lib/std/math/sinh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/sqrt.zig b/lib/std/math/sqrt.zig
index 5cd224aaaad8949d3f09f53d3f4629bdc138415a..d54063dcf62bf80fb54982bdc0fa8ef9a213cf85 100644
--- a/lib/std/math/sqrt.zig
+++ b/lib/std/math/sqrt.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const math = std.math;
 const expect = std.testing.expect;
diff --git a/lib/std/math/tan.zig b/lib/std/math/tan.zig
index 7fedf301c4f469c14ea66a90a691ccf5bb54245e..d2c5009fb67ced76959c2f7a435bf5002a11fb36 100644
--- a/lib/std/math/tan.zig
+++ b/lib/std/math/tan.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from go, which is licensed under a BSD-3 license.
 // https://golang.org/LICENSE
 //
diff --git a/lib/std/math/tanh.zig b/lib/std/math/tanh.zig
index 8f269db021b38d84c72be0c90b58b03e46b2ce93..dcde79a925a54c139e9d27a75b55439cb9670504 100644
--- a/lib/std/math/tanh.zig
+++ b/lib/std/math/tanh.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/math/trunc.zig b/lib/std/math/trunc.zig
index 0d83dc608d042c73db35cc70c8a3ea27d52d36f4..eab9a8b0c7cfdb757708123ecd0ec7f90115309a 100644
--- a/lib/std/math/trunc.zig
+++ b/lib/std/math/trunc.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from musl, which is licensed under the MIT license:
 // https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 //
diff --git a/lib/std/mem.zig b/lib/std/mem.zig
index a0e87f26a5dcfc4da781c233a5ca2ffb7418d0ef..57d5a383119b2be51a553782e1f45db4bc7c735c 100644
--- a/lib/std/mem.zig
+++ b/lib/std/mem.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const debug = std.debug;
 const assert = debug.assert;
diff --git a/lib/std/mem/Allocator.zig b/lib/std/mem/Allocator.zig
index 1e13ed97b74d55472ec5c064870383782a3933cd..9ea7aeb90e2a7db5b2f5b41dd82bf7381868f61b 100644
--- a/lib/std/mem/Allocator.zig
+++ b/lib/std/mem/Allocator.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //! The standard memory allocation interface.
 
 const std = @import("../std.zig");
diff --git a/lib/std/meta.zig b/lib/std/meta.zig
index 03fb4f80f145a5c6c96a9c40ecd987bcefb81c85..a1bfacf59700b3a396d93a0cef6721bc3f35d187 100644
--- a/lib/std/meta.zig
+++ b/lib/std/meta.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const builtin = std.builtin;
 const debug = std.debug;
diff --git a/lib/std/meta/trailer_flags.zig b/lib/std/meta/trailer_flags.zig
index 595f6917d916ebd9c65787a43a9981fb52b0af90..516a65cfac825470fe558e8708cb4c24d2e18f68 100644
--- a/lib/std/meta/trailer_flags.zig
+++ b/lib/std/meta/trailer_flags.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const meta = std.meta;
 const testing = std.testing;
diff --git a/lib/std/meta/trait.zig b/lib/std/meta/trait.zig
index 26330aebc476f01f20d0cf177972532475fbef16..d1590141a16f0554da2921b202a9b78e292cec94 100644
--- a/lib/std/meta/trait.zig
+++ b/lib/std/meta/trait.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const mem = std.mem;
diff --git a/lib/std/multi_array_list.zig b/lib/std/multi_array_list.zig
index 9707c0634aa9847b21ab2a39e4c4bb995f01aad0..693937b399b522136cb2ae6fb72839106f03b9fe 100644
--- a/lib/std/multi_array_list.zig
+++ b/lib/std/multi_array_list.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const assert = std.debug.assert;
 const meta = std.meta;
diff --git a/lib/std/net.zig b/lib/std/net.zig
index fea033dc9cfc385d24c2ee0df7fe7c47e200a075..c7411d9ecc7721b054fdd7d2dec762b2547430fb 100644
--- a/lib/std/net.zig
+++ b/lib/std/net.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const builtin = @import("builtin");
 const assert = std.debug.assert;
diff --git a/lib/std/net/test.zig b/lib/std/net/test.zig
index 589efbf53e2183b3c56a7f26c447b3aae3e45b50..2e63fc9329c478bebf2bd799401754ce6e1f1dfa 100644
--- a/lib/std/net/test.zig
+++ b/lib/std/net/test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const builtin = std.builtin;
 const net = std.net;
diff --git a/lib/std/once.zig b/lib/std/once.zig
index a557f4aac9c99d3f1d9f4a53ef4e590ddec755e3..638d3b10661ec28e67b6fa0e66c3f50b9e2628a5 100644
--- a/lib/std/once.zig
+++ b/lib/std/once.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const builtin = std.builtin;
 const testing = std.testing;
diff --git a/lib/std/os.zig b/lib/std/os.zig
index 7781233a490f3a7043ae59c98c25d00e10d6fd96..294784c2bdbb4cb9885e16df15803e8096b7bfea 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // This file contains thin wrappers around OS-specific APIs, with these
 // specific goals in mind:
 // * Convert "errno"-style error codes into Zig errors.
diff --git a/lib/std/os/bits.zig b/lib/std/os/bits.zig
index 5c396091825f358816ad0a0c99e96dd5a94c455b..36eda7707f9634de8c3ffd990fab0f7d1fe44855 100644
--- a/lib/std/os/bits.zig
+++ b/lib/std/os/bits.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //! Platform-dependent types and values that are used along with OS-specific APIs.
 //! These are imported into `std.c`, `std.os`, and `std.os.linux`.
 //! Root source files can define `os.bits` and these will additionally be added
diff --git a/lib/std/os/bits/darwin.zig b/lib/std/os/bits/darwin.zig
index 35d507541e52ec0b0202e21cb51327fe5c9835f8..a0f5e5a400cfbfa70c281203e91692cddf01dfcf 100644
--- a/lib/std/os/bits/darwin.zig
+++ b/lib/std/os/bits/darwin.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const assert = std.debug.assert;
 const maxInt = std.math.maxInt;
diff --git a/lib/std/os/bits/dragonfly.zig b/lib/std/os/bits/dragonfly.zig
index cf647a8438283c75501868ba0ad25bf1ccca6621..c13a3aea910e736fa19ddb1e62f8020fbff762dd 100644
--- a/lib/std/os/bits/dragonfly.zig
+++ b/lib/std/os/bits/dragonfly.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const maxInt = std.math.maxInt;
 
diff --git a/lib/std/os/bits/freebsd.zig b/lib/std/os/bits/freebsd.zig
index b60676e266d7e5cf7c1ec68413c7ad9b15348966..51b7ef9f4dd3c28408c375a6683079dd3662a08d 100644
--- a/lib/std/os/bits/freebsd.zig
+++ b/lib/std/os/bits/freebsd.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const builtin = @import("builtin");
 const maxInt = std.math.maxInt;
diff --git a/lib/std/os/bits/haiku.zig b/lib/std/os/bits/haiku.zig
index 8421c80a52b5c2c27683f6a297e4b44d4274793a..620bf2341404cb3a12d9b16b4e383a96ebf0e88d 100644
--- a/lib/std/os/bits/haiku.zig
+++ b/lib/std/os/bits/haiku.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2020 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const maxInt = std.math.maxInt;
 
diff --git a/lib/std/os/bits/linux.zig b/lib/std/os/bits/linux.zig
index 1dbc552b3c589d032ddb3189f8eb407a9fa17998..653fb8f1e1b47e369c3dc5ca433b815d1694f9c4 100644
--- a/lib/std/os/bits/linux.zig
+++ b/lib/std/os/bits/linux.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const maxInt = std.math.maxInt;
 const arch = @import("builtin").target.cpu.arch;
diff --git a/lib/std/os/bits/linux/arm-eabi.zig b/lib/std/os/bits/linux/arm-eabi.zig
index 335ea074ec2ccb075c299485202a6e8048d3a1b3..91ca2b32d2b4127798f9188aba7dd1c999c24532 100644
--- a/lib/std/os/bits/linux/arm-eabi.zig
+++ b/lib/std/os/bits/linux/arm-eabi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // arm-eabi-specific declarations that are intended to be imported into the POSIX namespace.
 const std = @import("../../../std.zig");
 const linux = std.os.linux;
diff --git a/lib/std/os/bits/linux/arm64.zig b/lib/std/os/bits/linux/arm64.zig
index e0771e7f662e4f0619b9042958edd3035a0c044a..67c77ce186cf6b7472d406fe7b03f914f610a312 100644
--- a/lib/std/os/bits/linux/arm64.zig
+++ b/lib/std/os/bits/linux/arm64.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // arm64-specific declarations that are intended to be imported into the POSIX namespace.
 // This does include Linux-only APIs.
 
diff --git a/lib/std/os/bits/linux/errno/generic.zig b/lib/std/os/bits/linux/errno/generic.zig
index 49b35f650117c7fb0165f5312d29874c0d890d1b..730c71a5a2f30b64582f444fd98a0181a9b414ae 100644
--- a/lib/std/os/bits/linux/errno/generic.zig
+++ b/lib/std/os/bits/linux/errno/generic.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 pub const E = enum(u16) {
     /// No error occurred.
     /// Same code used for `NSROK`.
diff --git a/lib/std/os/bits/linux/errno/mips.zig b/lib/std/os/bits/linux/errno/mips.zig
index 4f14db65ee40d7dcba80c19ff3bdd863e569dd60..39fb9f71eaecbfa01aafe54bb133138942259820 100644
--- a/lib/std/os/bits/linux/errno/mips.zig
+++ b/lib/std/os/bits/linux/errno/mips.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! These are MIPS ABI compatible.
 pub const E = enum(i32) {
     /// No error occurred.
diff --git a/lib/std/os/bits/linux/errno/sparc.zig b/lib/std/os/bits/linux/errno/sparc.zig
index cc43ce1a94c941008d3b64566bd4ea8bd82ea5cf..c4ab65f34a5aa84bf3ce2a5f225a8705770b3203 100644
--- a/lib/std/os/bits/linux/errno/sparc.zig
+++ b/lib/std/os/bits/linux/errno/sparc.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! These match the SunOS error numbering scheme.
 pub const E = enum(i32) {
     /// No error occurred.
diff --git a/lib/std/os/bits/linux/i386.zig b/lib/std/os/bits/linux/i386.zig
index f8dadb8a6026c5895041b93a5ce594dfd369b667..12c8fa4713732b2f2f868fdf63bed590b8cbf47d 100644
--- a/lib/std/os/bits/linux/i386.zig
+++ b/lib/std/os/bits/linux/i386.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // i386-specific declarations that are intended to be imported into the POSIX namespace.
 // This does include Linux-only APIs.
 
diff --git a/lib/std/os/bits/linux/mips.zig b/lib/std/os/bits/linux/mips.zig
index e158755889558a4d735402859b9fb5f47ef4217d..ddf241fb4d380fe3ea3eea0143f16a629bf3b5d7 100644
--- a/lib/std/os/bits/linux/mips.zig
+++ b/lib/std/os/bits/linux/mips.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../../std.zig");
 const linux = std.os.linux;
 const socklen_t = linux.socklen_t;
diff --git a/lib/std/os/bits/linux/netlink.zig b/lib/std/os/bits/linux/netlink.zig
index a840a476257a94a498b2b43da09faae18b01cfd4..9de546fb208ef8c53fe8d0d1e0d2b9408d018ced 100644
--- a/lib/std/os/bits/linux/netlink.zig
+++ b/lib/std/os/bits/linux/netlink.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("../linux.zig");
 
 /// Routing/device hook
diff --git a/lib/std/os/bits/linux/powerpc.zig b/lib/std/os/bits/linux/powerpc.zig
index 96908cb7141ef4b585aa3efc8062cd79cbb8a728..06f8e326ba2d125ef449b3f90ee608d642e9d396 100644
--- a/lib/std/os/bits/linux/powerpc.zig
+++ b/lib/std/os/bits/linux/powerpc.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../../../std.zig");
 const linux = std.os.linux;
 const socklen_t = linux.socklen_t;
diff --git a/lib/std/os/bits/linux/powerpc64.zig b/lib/std/os/bits/linux/powerpc64.zig
index 52b9109247f1ee66120018d0c68f4fa289c807bc..74c6ad11fc7a3bba448215dc600500496d356376 100644
--- a/lib/std/os/bits/linux/powerpc64.zig
+++ b/lib/std/os/bits/linux/powerpc64.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../../../std.zig");
 const linux = std.os.linux;
 const socklen_t = linux.socklen_t;
diff --git a/lib/std/os/bits/linux/prctl.zig b/lib/std/os/bits/linux/prctl.zig
index 249e60eca3f46a711ed8a962231cab2c7259224e..d29b6021b606def81eee77fa0b9d142cc270d430 100644
--- a/lib/std/os/bits/linux/prctl.zig
+++ b/lib/std/os/bits/linux/prctl.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 pub const PR = enum(i32) {
     SET_PDEATHSIG = 1,
     GET_PDEATHSIG = 2,
diff --git a/lib/std/os/bits/linux/riscv64.zig b/lib/std/os/bits/linux/riscv64.zig
index 6147bca64f7b1adc983cb55351114f955bb03cf9..7a0811cc1ab048e772b9ec6d0e99850ab9952def 100644
--- a/lib/std/os/bits/linux/riscv64.zig
+++ b/lib/std/os/bits/linux/riscv64.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // riscv64-specific declarations that are intended to be imported into the POSIX namespace.
 const std = @import("../../../std.zig");
 const uid_t = std.os.linux.uid_t;
diff --git a/lib/std/os/bits/linux/securebits.zig b/lib/std/os/bits/linux/securebits.zig
index 374f7c9f02dcb1e7a88dbf962229bedeab82d127..a23ced3cf2ecdde7e559d60f4306163af4d8ad32 100644
--- a/lib/std/os/bits/linux/securebits.zig
+++ b/lib/std/os/bits/linux/securebits.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 fn issecure_mask(comptime x: comptime_int) comptime_int {
     return 1 << x;
 }
diff --git a/lib/std/os/bits/linux/x86_64.zig b/lib/std/os/bits/linux/x86_64.zig
index 30e5af384f9c6a96a353df448e5740589b59501c..69beac9d878fdcf2e6a9950948f5832f3645675b 100644
--- a/lib/std/os/bits/linux/x86_64.zig
+++ b/lib/std/os/bits/linux/x86_64.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // x86-64-specific declarations that are intended to be imported into the POSIX namespace.
 const std = @import("../../../std.zig");
 const pid_t = linux.pid_t;
diff --git a/lib/std/os/bits/linux/xdp.zig b/lib/std/os/bits/linux/xdp.zig
index be615ecf98f3220be0dca47cfd607e8d7c33867f..88fa9918a356ab94203a0d9fd8c61417756cc1fd 100644
--- a/lib/std/os/bits/linux/xdp.zig
+++ b/lib/std/os/bits/linux/xdp.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("../linux.zig");
 
 pub const XDP_SHARED_UMEM = (1 << 0);
diff --git a/lib/std/os/bits/netbsd.zig b/lib/std/os/bits/netbsd.zig
index f1bfe1b958a87695c104f9c940bed1edd90c746f..be35889042c44566b823cdb710493b1631d44cc0 100644
--- a/lib/std/os/bits/netbsd.zig
+++ b/lib/std/os/bits/netbsd.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const builtin = std.builtin;
 const maxInt = std.math.maxInt;
diff --git a/lib/std/os/bits/openbsd.zig b/lib/std/os/bits/openbsd.zig
index 5ad1f8980bf8922dd49e93bd0eca8093afe40dc9..c7d1c0583bc62370ebaf76b5bfa9b1fea88459de 100644
--- a/lib/std/os/bits/openbsd.zig
+++ b/lib/std/os/bits/openbsd.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const builtin = std.builtin;
 const maxInt = std.math.maxInt;
diff --git a/lib/std/os/bits/posix.zig b/lib/std/os/bits/posix.zig
index 0f015cd57356c62a2943fd944e631837c13c5f1d..6ffd2dcf6a061fcbe7b4ac9df4bcb743a2629dc7 100644
--- a/lib/std/os/bits/posix.zig
+++ b/lib/std/os/bits/posix.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 pub const iovec = extern struct {
     iov_base: [*]u8,
     iov_len: usize,
diff --git a/lib/std/os/bits/wasi.zig b/lib/std/os/bits/wasi.zig
index eb68946f05d8dcaff124c5a2bb35c0a9e110b3ef..567d74961ef8f72cf6c99e5e83cf211138ffca4a 100644
--- a/lib/std/os/bits/wasi.zig
+++ b/lib/std/os/bits/wasi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Convenience types and consts used by std.os module
 const builtin = @import("builtin");
 const posix = @import("posix.zig");
diff --git a/lib/std/os/bits/windows.zig b/lib/std/os/bits/windows.zig
index 3943d1fd3d35de82a24f16892421958da7667985..bb57a13ffebecfe218530e6d056fa922f1e1ddec 100644
--- a/lib/std/os/bits/windows.zig
+++ b/lib/std/os/bits/windows.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // The reference for these types and values is Microsoft Windows's ucrt (Universal C RunTime).
 
 usingnamespace @import("../windows/bits.zig");
diff --git a/lib/std/os/darwin.zig b/lib/std/os/darwin.zig
index 572b470239fecf357b0bbeaca36a52950788a790..5f9684b96de967ee7422a2d96322c156ed2dbdbf 100644
--- a/lib/std/os/darwin.zig
+++ b/lib/std/os/darwin.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 pub usingnamespace std.c;
 pub usingnamespace @import("bits.zig");
diff --git a/lib/std/os/dragonfly.zig b/lib/std/os/dragonfly.zig
index 572b470239fecf357b0bbeaca36a52950788a790..5f9684b96de967ee7422a2d96322c156ed2dbdbf 100644
--- a/lib/std/os/dragonfly.zig
+++ b/lib/std/os/dragonfly.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 pub usingnamespace std.c;
 pub usingnamespace @import("bits.zig");
diff --git a/lib/std/os/freebsd.zig b/lib/std/os/freebsd.zig
index 572b470239fecf357b0bbeaca36a52950788a790..5f9684b96de967ee7422a2d96322c156ed2dbdbf 100644
--- a/lib/std/os/freebsd.zig
+++ b/lib/std/os/freebsd.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 pub usingnamespace std.c;
 pub usingnamespace @import("bits.zig");
diff --git a/lib/std/os/haiku.zig b/lib/std/os/haiku.zig
index a713a009ad7efb65951a1cbb2ae7dee62274e608..5f9684b96de967ee7422a2d96322c156ed2dbdbf 100644
--- a/lib/std/os/haiku.zig
+++ b/lib/std/os/haiku.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2020 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 pub usingnamespace std.c;
 pub usingnamespace @import("bits.zig");
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index 841f77467c748d75760a0e7aaf1158306723a950..369fae8f5325a72edbf87707314e49a55ac375ba 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // This file provides the system interface functions for Linux matching those
 // that are provided by libc, whether or not libc is linked. The following
 // abstractions are made:
diff --git a/lib/std/os/linux/arm-eabi.zig b/lib/std/os/linux/arm-eabi.zig
index 469b7299d194c3a720ce03acb5c60ca90879ba1a..ded72fd100cffc76415eecabb11c61a0b51e328d 100644
--- a/lib/std/os/linux/arm-eabi.zig
+++ b/lib/std/os/linux/arm-eabi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("../bits/linux.zig");
 
 pub fn syscall0(number: SYS) usize {
diff --git a/lib/std/os/linux/arm64.zig b/lib/std/os/linux/arm64.zig
index 4c8306c048d980dafefebc1254eb4742c7c478f3..92942a16cefebeb2c0b185e80f923fabf7bd7e7e 100644
--- a/lib/std/os/linux/arm64.zig
+++ b/lib/std/os/linux/arm64.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("../bits/linux.zig");
 
 pub fn syscall0(number: SYS) usize {
diff --git a/lib/std/os/linux/bpf.zig b/lib/std/os/linux/bpf.zig
index 8afd85162941ef0c7358d57986333647a7344bbd..cff4acaeee6afdb023e8fd350cb935afd82b3a3e 100644
--- a/lib/std/os/linux/bpf.zig
+++ b/lib/std/os/linux/bpf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace std.os.linux;
 const std = @import("../../std.zig");
 const errno = getErrno;
diff --git a/lib/std/os/linux/bpf/btf.zig b/lib/std/os/linux/bpf/btf.zig
index d8a0cb57a908045a00a58952cec527b13d45abc8..35eaf10561068221f9c3f62106f8257da8434cd0 100644
--- a/lib/std/os/linux/bpf/btf.zig
+++ b/lib/std/os/linux/bpf/btf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const magic = 0xeb9f;
 const version = 1;
 
diff --git a/lib/std/os/linux/bpf/btf_ext.zig b/lib/std/os/linux/bpf/btf_ext.zig
index ca713f1910b549ac38742077de8686f1e60d41b3..05d5d57059221e5ddee5cef3ba827d0b16dfe4a7 100644
--- a/lib/std/os/linux/bpf/btf_ext.zig
+++ b/lib/std/os/linux/bpf/btf_ext.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const Header = packed struct {
     magic: u16,
     version: u8,
diff --git a/lib/std/os/linux/bpf/helpers.zig b/lib/std/os/linux/bpf/helpers.zig
index 757c37949b8c0128b645550656e081c6857bb467..86c86c1ec5a6ae946ce73555787851c7580e442c 100644
--- a/lib/std/os/linux/bpf/helpers.zig
+++ b/lib/std/os/linux/bpf/helpers.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const kern = @import("kern.zig");
 
 // in BPF, all the helper calls
diff --git a/lib/std/os/linux/bpf/kern.zig b/lib/std/os/linux/bpf/kern.zig
index 4d489eef5c4d4f2a133fc5c9a410bb394cb258e1..729495e91d18036abfcdc87c906bf05180ac1f8f 100644
--- a/lib/std/os/linux/bpf/kern.zig
+++ b/lib/std/os/linux/bpf/kern.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../../std.zig");
 
 const in_bpf_program = switch (std.builtin.cpu.arch) {
diff --git a/lib/std/os/linux/i386.zig b/lib/std/os/linux/i386.zig
index 2ec34bac40f2547c481282bc774427afe3f84ac4..70178656d551da225ecc3fa6b55a76b8addd9d1b 100644
--- a/lib/std/os/linux/i386.zig
+++ b/lib/std/os/linux/i386.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("../bits/linux.zig");
 
 pub fn syscall0(number: SYS) usize {
diff --git a/lib/std/os/linux/io_uring.zig b/lib/std/os/linux/io_uring.zig
index 1db4c30d2a51caf412213a3478df8e4952f87c27..b74a7da3dd0dce2e3c2bf3a9a3703cf71526868f 100644
--- a/lib/std/os/linux/io_uring.zig
+++ b/lib/std/os/linux/io_uring.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const assert = std.debug.assert;
 const builtin = std.builtin;
diff --git a/lib/std/os/linux/mips.zig b/lib/std/os/linux/mips.zig
index 85157f04f865f39d14068c7c67fc6a88c80f7db7..5cff1e92657dab232b76e410e085f9e9271c309e 100644
--- a/lib/std/os/linux/mips.zig
+++ b/lib/std/os/linux/mips.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("../bits/linux.zig");
 
 pub fn syscall0(number: SYS) usize {
diff --git a/lib/std/os/linux/powerpc.zig b/lib/std/os/linux/powerpc.zig
index 611eee1c5f0bd8257d35f0004028379a0b677a53..c48d86a155e929a113c5f9aa926bdc50e77674a6 100644
--- a/lib/std/os/linux/powerpc.zig
+++ b/lib/std/os/linux/powerpc.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 usingnamespace @import("../bits/linux.zig");
 
 pub fn syscall0(number: SYS) usize {
diff --git a/lib/std/os/linux/powerpc64.zig b/lib/std/os/linux/powerpc64.zig
index 611eee1c5f0bd8257d35f0004028379a0b677a53..c48d86a155e929a113c5f9aa926bdc50e77674a6 100644
--- a/lib/std/os/linux/powerpc64.zig
+++ b/lib/std/os/linux/powerpc64.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 usingnamespace @import("../bits/linux.zig");
 
 pub fn syscall0(number: SYS) usize {
diff --git a/lib/std/os/linux/riscv64.zig b/lib/std/os/linux/riscv64.zig
index 3e2b15b599c016cb506c94e38836830805451e14..dfc7e164e8c796aa96241bee0143211ae11bea2a 100644
--- a/lib/std/os/linux/riscv64.zig
+++ b/lib/std/os/linux/riscv64.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("../bits/linux.zig");
 
 pub fn syscall0(number: SYS) usize {
diff --git a/lib/std/os/linux/test.zig b/lib/std/os/linux/test.zig
index 8efa6c754f1bcbd7248cc584a0e36ea97f8b773a..e45c9dbb993715b27e1e84fe4e87b088c9d73a62 100644
--- a/lib/std/os/linux/test.zig
+++ b/lib/std/os/linux/test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const builtin = std.builtin;
 const linux = std.os.linux;
diff --git a/lib/std/os/linux/thumb.zig b/lib/std/os/linux/thumb.zig
index 85f8bfc52b41c7f3dc2c8889767fc0a5d7f106d2..d965e4430ef82722b0f3b0fdf9d5e93481635519 100644
--- a/lib/std/os/linux/thumb.zig
+++ b/lib/std/os/linux/thumb.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("../bits/linux.zig");
 
 // The syscall interface is identical to the ARM one but we're facing an extra
diff --git a/lib/std/os/linux/tls.zig b/lib/std/os/linux/tls.zig
index 5649cadd8b99ea18216687c9b77e4826755bf0b0..47230cf7869d995ff91273d5d604f92a36f72b8f 100644
--- a/lib/std/os/linux/tls.zig
+++ b/lib/std/os/linux/tls.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const os = std.os;
 const mem = std.mem;
diff --git a/lib/std/os/linux/vdso.zig b/lib/std/os/linux/vdso.zig
index f42bb064528ba5df7b898f8369b43fc3f5c6ef6d..f059ccad4ef5ec5875173251dcc12f1f4614e842 100644
--- a/lib/std/os/linux/vdso.zig
+++ b/lib/std/os/linux/vdso.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const elf = std.elf;
 const linux = std.os.linux;
diff --git a/lib/std/os/linux/x86_64.zig b/lib/std/os/linux/x86_64.zig
index 5aa32c56c3023da92bb55c876329ca3e237f2188..c403742d3d265d91f4bf4987a9c0b36eb1db60ac 100644
--- a/lib/std/os/linux/x86_64.zig
+++ b/lib/std/os/linux/x86_64.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("../bits/linux.zig");
 
 pub fn syscall0(number: SYS) usize {
diff --git a/lib/std/os/netbsd.zig b/lib/std/os/netbsd.zig
index 572b470239fecf357b0bbeaca36a52950788a790..5f9684b96de967ee7422a2d96322c156ed2dbdbf 100644
--- a/lib/std/os/netbsd.zig
+++ b/lib/std/os/netbsd.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 pub usingnamespace std.c;
 pub usingnamespace @import("bits.zig");
diff --git a/lib/std/os/openbsd.zig b/lib/std/os/openbsd.zig
index 572b470239fecf357b0bbeaca36a52950788a790..5f9684b96de967ee7422a2d96322c156ed2dbdbf 100644
--- a/lib/std/os/openbsd.zig
+++ b/lib/std/os/openbsd.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 pub usingnamespace std.c;
 pub usingnamespace @import("bits.zig");
diff --git a/lib/std/os/test.zig b/lib/std/os/test.zig
index fb23f4459aeec22c99324be225792e7a4352d10c..53a040294e9bf3d2fe8cf1effe9a2c5b87f0514b 100644
--- a/lib/std/os/test.zig
+++ b/lib/std/os/test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const os = std.os;
 const testing = std.testing;
diff --git a/lib/std/os/uefi.zig b/lib/std/os/uefi.zig
index 4bb8e375599e13087bce2eee604ccfa69e77a70f..b4582c121dc02b89566b991cf5e3db5e51a9ba36 100644
--- a/lib/std/os/uefi.zig
+++ b/lib/std/os/uefi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 
 /// A protocol is an interface identified by a GUID.
diff --git a/lib/std/os/uefi/protocols.zig b/lib/std/os/uefi/protocols.zig
index 68dafdcecbb0130611803f6bc17c16d002daa8ac..353c628a0582a5e1977a268c05def60ecb9a9c20 100644
--- a/lib/std/os/uefi/protocols.zig
+++ b/lib/std/os/uefi/protocols.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const LoadedImageProtocol = @import("protocols/loaded_image_protocol.zig").LoadedImageProtocol;
 pub const loaded_image_device_path_protocol_guid = @import("protocols/loaded_image_protocol.zig").loaded_image_device_path_protocol_guid;
 
diff --git a/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig b/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig
index 3dfe97233194f1639d84b743cbec71bfcb359573..ee795692338c3a6ac88e444ed0be43c137d26d6b 100644
--- a/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig
+++ b/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
diff --git a/lib/std/os/uefi/protocols/device_path_protocol.zig b/lib/std/os/uefi/protocols/device_path_protocol.zig
index d6b239fbbb88f79d85f4d123e177dc766a9c727b..df5949882207fa25699d4e7d3d5eed1376eb4499 100644
--- a/lib/std/os/uefi/protocols/device_path_protocol.zig
+++ b/lib/std/os/uefi/protocols/device_path_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 
diff --git a/lib/std/os/uefi/protocols/edid_active_protocol.zig b/lib/std/os/uefi/protocols/edid_active_protocol.zig
index 750ff2833b17fa6746aeaeb6340f8839cd273659..fcdef78d83f7090b13d1c087b66f7d1c19d2bb1c 100644
--- a/lib/std/os/uefi/protocols/edid_active_protocol.zig
+++ b/lib/std/os/uefi/protocols/edid_active_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 
diff --git a/lib/std/os/uefi/protocols/edid_discovered_protocol.zig b/lib/std/os/uefi/protocols/edid_discovered_protocol.zig
index fdbe59456337f17f46bb5f08730630824c560738..00b59cb6c816ad7447ec566a7cc0d9c61d6339ce 100644
--- a/lib/std/os/uefi/protocols/edid_discovered_protocol.zig
+++ b/lib/std/os/uefi/protocols/edid_discovered_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 
diff --git a/lib/std/os/uefi/protocols/edid_override_protocol.zig b/lib/std/os/uefi/protocols/edid_override_protocol.zig
index ad3a0939b552e7152f06ddd37c065dfaff65bc4d..8bf848c59abd7e5ec46aaf1b7166c623ba0a8160 100644
--- a/lib/std/os/uefi/protocols/edid_override_protocol.zig
+++ b/lib/std/os/uefi/protocols/edid_override_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Handle = uefi.Handle;
diff --git a/lib/std/os/uefi/protocols/file_protocol.zig b/lib/std/os/uefi/protocols/file_protocol.zig
index a1d001065c2a4891f2a3ad76010c9478cad6c931..1f80df0af2d12cbbab304ee4e7d0bf2b149ca01b 100644
--- a/lib/std/os/uefi/protocols/file_protocol.zig
+++ b/lib/std/os/uefi/protocols/file_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Time = uefi.Time;
diff --git a/lib/std/os/uefi/protocols/graphics_output_protocol.zig b/lib/std/os/uefi/protocols/graphics_output_protocol.zig
index 4cb7744e8a2ccf6eb47b94701eace2b079100cd2..a3bb50f0d2143552ec9a01b04c8b57ed84de7211 100644
--- a/lib/std/os/uefi/protocols/graphics_output_protocol.zig
+++ b/lib/std/os/uefi/protocols/graphics_output_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Status = uefi.Status;
diff --git a/lib/std/os/uefi/protocols/hii.zig b/lib/std/os/uefi/protocols/hii.zig
index 9d85f293b38ef73be47f572229d426b4478a9293..5e3c23d22ab810bfa0eaedb3c2e2bf029216e762 100644
--- a/lib/std/os/uefi/protocols/hii.zig
+++ b/lib/std/os/uefi/protocols/hii.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 
diff --git a/lib/std/os/uefi/protocols/hii_database_protocol.zig b/lib/std/os/uefi/protocols/hii_database_protocol.zig
index 33014e1cb75de388be719a00e33aebf85138c6f4..e34f72c2f3b7ebdc81bae865d8ef11d43ee8a280 100644
--- a/lib/std/os/uefi/protocols/hii_database_protocol.zig
+++ b/lib/std/os/uefi/protocols/hii_database_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Status = uefi.Status;
diff --git a/lib/std/os/uefi/protocols/hii_popup_protocol.zig b/lib/std/os/uefi/protocols/hii_popup_protocol.zig
index ebbc1608b7bbeecceffaf3ecb1b57e97162d4089..cf6bdf6da539e5fdc04da13a4f10af62a0d8f586 100644
--- a/lib/std/os/uefi/protocols/hii_popup_protocol.zig
+++ b/lib/std/os/uefi/protocols/hii_popup_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Status = uefi.Status;
diff --git a/lib/std/os/uefi/protocols/ip6_config_protocol.zig b/lib/std/os/uefi/protocols/ip6_config_protocol.zig
index d6af0e5f39c0957f21b8cc3be6fa77b37d3c415c..aa9d783fd88232306aab921b3f27abdc95a2ddd9 100644
--- a/lib/std/os/uefi/protocols/ip6_config_protocol.zig
+++ b/lib/std/os/uefi/protocols/ip6_config_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Event = uefi.Event;
diff --git a/lib/std/os/uefi/protocols/ip6_protocol.zig b/lib/std/os/uefi/protocols/ip6_protocol.zig
index fbca959656f5c9818af2560cb8af452d885ce00e..dbe0f163968c4764b3a93c8ab39cdc70098ae595 100644
--- a/lib/std/os/uefi/protocols/ip6_protocol.zig
+++ b/lib/std/os/uefi/protocols/ip6_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Event = uefi.Event;
diff --git a/lib/std/os/uefi/protocols/ip6_service_binding_protocol.zig b/lib/std/os/uefi/protocols/ip6_service_binding_protocol.zig
index 69a410c01ca132271e9e3fdf72d6c056a56467ba..97ab1a431c2ee9d2cdb60d1707c19d5773c1e249 100644
--- a/lib/std/os/uefi/protocols/ip6_service_binding_protocol.zig
+++ b/lib/std/os/uefi/protocols/ip6_service_binding_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Handle = uefi.Handle;
 const Guid = uefi.Guid;
diff --git a/lib/std/os/uefi/protocols/loaded_image_protocol.zig b/lib/std/os/uefi/protocols/loaded_image_protocol.zig
index a5c5610f9b81c65a82b894c648b5a14a2e249ad7..b8afcb1063a159f4d69c26371c9f203039661e42 100644
--- a/lib/std/os/uefi/protocols/loaded_image_protocol.zig
+++ b/lib/std/os/uefi/protocols/loaded_image_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Handle = uefi.Handle;
diff --git a/lib/std/os/uefi/protocols/managed_network_protocol.zig b/lib/std/os/uefi/protocols/managed_network_protocol.zig
index 0da6d902f32c3656d32f9e639dab3593b06750b9..122482be236d177345629f4cce51472ab1e9ea40 100644
--- a/lib/std/os/uefi/protocols/managed_network_protocol.zig
+++ b/lib/std/os/uefi/protocols/managed_network_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Event = uefi.Event;
diff --git a/lib/std/os/uefi/protocols/managed_network_service_binding_protocol.zig b/lib/std/os/uefi/protocols/managed_network_service_binding_protocol.zig
index f0b8c5fb152d0eef87f0e038eaee5921a05086d2..e9657e445640664043523f98e1fd6de1449fc7d7 100644
--- a/lib/std/os/uefi/protocols/managed_network_service_binding_protocol.zig
+++ b/lib/std/os/uefi/protocols/managed_network_service_binding_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Handle = uefi.Handle;
 const Guid = uefi.Guid;
diff --git a/lib/std/os/uefi/protocols/rng_protocol.zig b/lib/std/os/uefi/protocols/rng_protocol.zig
index 25f7c936c317c239283d1e1ae3eccfc0bd372966..a32b202f4428757128b7cc3c63cc1a235f24e425 100644
--- a/lib/std/os/uefi/protocols/rng_protocol.zig
+++ b/lib/std/os/uefi/protocols/rng_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Status = uefi.Status;
diff --git a/lib/std/os/uefi/protocols/shell_parameters_protocol.zig b/lib/std/os/uefi/protocols/shell_parameters_protocol.zig
index 338d88fc9bf9d40b4dc7d3e95d6d6fd87b539226..afbd26e9390a17ed4de3e0c6373d3aca1c55ccd0 100644
--- a/lib/std/os/uefi/protocols/shell_parameters_protocol.zig
+++ b/lib/std/os/uefi/protocols/shell_parameters_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const FileHandle = uefi.FileHandle;
diff --git a/lib/std/os/uefi/protocols/simple_file_system_protocol.zig b/lib/std/os/uefi/protocols/simple_file_system_protocol.zig
index 68f08ebff868bc8decf9755721c7a63a706cca59..119c1e658723dc116ed599c586aa5378c56931c8 100644
--- a/lib/std/os/uefi/protocols/simple_file_system_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_file_system_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const FileProtocol = uefi.protocols.FileProtocol;
diff --git a/lib/std/os/uefi/protocols/simple_network_protocol.zig b/lib/std/os/uefi/protocols/simple_network_protocol.zig
index 1cd93bc4917840b262e4276b0ba664c9b4d89bc9..a3743ac2c193f41b97ad012a907009000c18e47c 100644
--- a/lib/std/os/uefi/protocols/simple_network_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_network_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
diff --git a/lib/std/os/uefi/protocols/simple_pointer_protocol.zig b/lib/std/os/uefi/protocols/simple_pointer_protocol.zig
index b76b5bc512a922f2ee594eac73d9db4d3c0117df..d217ab593027dfebb2da4c6673779281bf9d9173 100644
--- a/lib/std/os/uefi/protocols/simple_pointer_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_pointer_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
diff --git a/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig b/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig
index 0cc1416641030bb9bad142b44a0c622a5cb6f507..4a2b098e61a98efa19498d0de1bac46d6791e063 100644
--- a/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
diff --git a/lib/std/os/uefi/protocols/simple_text_input_protocol.zig b/lib/std/os/uefi/protocols/simple_text_input_protocol.zig
index 47e632021b54e63e22240959f6d0351461ab46ef..8102ea99559de3f8293bc57d03987457f15893f9 100644
--- a/lib/std/os/uefi/protocols/simple_text_input_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_text_input_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
diff --git a/lib/std/os/uefi/protocols/simple_text_output_protocol.zig b/lib/std/os/uefi/protocols/simple_text_output_protocol.zig
index 6fb56724c714f6ee928bdbfcb3dc93d1900f9197..84f540cb786ac7ace519b406473ca96987bf981e 100644
--- a/lib/std/os/uefi/protocols/simple_text_output_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_text_output_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Status = uefi.Status;
diff --git a/lib/std/os/uefi/protocols/udp6_protocol.zig b/lib/std/os/uefi/protocols/udp6_protocol.zig
index c2e42289987fc72fb41a02b81697aacfe1b0e286..46c76beaa60e5ba170f94bb867656b3e6354e3d9 100644
--- a/lib/std/os/uefi/protocols/udp6_protocol.zig
+++ b/lib/std/os/uefi/protocols/udp6_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const Event = uefi.Event;
diff --git a/lib/std/os/uefi/protocols/udp6_service_binding_protocol.zig b/lib/std/os/uefi/protocols/udp6_service_binding_protocol.zig
index 620f015722b9b79ae614c588222d378252f488ad..811692adc36dbdba5c017f56734fa73d927e6231 100644
--- a/lib/std/os/uefi/protocols/udp6_service_binding_protocol.zig
+++ b/lib/std/os/uefi/protocols/udp6_service_binding_protocol.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Handle = uefi.Handle;
 const Guid = uefi.Guid;
diff --git a/lib/std/os/uefi/status.zig b/lib/std/os/uefi/status.zig
index 48b8008b91b84d45172148b40989dfde503ee8be..09bc5030eb71e5c8ccb53802c32aaefeae6098c6 100644
--- a/lib/std/os/uefi/status.zig
+++ b/lib/std/os/uefi/status.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const high_bit = 1 << @typeInfo(usize).Int.bits - 1;
 
 pub const Status = enum(usize) {
diff --git a/lib/std/os/uefi/tables.zig b/lib/std/os/uefi/tables.zig
index 649fe95cd25cec49be8ec25491264d8def483d7b..0011c80a9cd20b6976c1a33a5591095cfd0bc0f0 100644
--- a/lib/std/os/uefi/tables.zig
+++ b/lib/std/os/uefi/tables.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const AllocateType = @import("tables/boot_services.zig").AllocateType;
 pub const BootServices = @import("tables/boot_services.zig").BootServices;
 pub const ConfigurationTable = @import("tables/configuration_table.zig").ConfigurationTable;
diff --git a/lib/std/os/uefi/tables/boot_services.zig b/lib/std/os/uefi/tables/boot_services.zig
index 8617642eaf5e166fa941a29702b584dbc98aa83e..31ac352089f8bcdafa0242e45cacbdc93a46070e 100644
--- a/lib/std/os/uefi/tables/boot_services.zig
+++ b/lib/std/os/uefi/tables/boot_services.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Event = uefi.Event;
 const Guid = uefi.Guid;
diff --git a/lib/std/os/uefi/tables/configuration_table.zig b/lib/std/os/uefi/tables/configuration_table.zig
index 00c8f2f42909da9c98361fe2a54c8717392b5269..0ac3bd73c8544c1630726448f0fcfe924f0d3a19 100644
--- a/lib/std/os/uefi/tables/configuration_table.zig
+++ b/lib/std/os/uefi/tables/configuration_table.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 
diff --git a/lib/std/os/uefi/tables/runtime_services.zig b/lib/std/os/uefi/tables/runtime_services.zig
index 2d1a1cdb82625b0667da0e45b47022bc607db443..c3c59f957fb9da6aa4aa70d4b982d823c2d42dfb 100644
--- a/lib/std/os/uefi/tables/runtime_services.zig
+++ b/lib/std/os/uefi/tables/runtime_services.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const Guid = uefi.Guid;
 const TableHeader = uefi.tables.TableHeader;
diff --git a/lib/std/os/uefi/tables/system_table.zig b/lib/std/os/uefi/tables/system_table.zig
index c5b6c5f1e9f626fe30acc23017e40d77171ec0cc..b52104f9c7d62d4ab5dd09e61b2abbf2fdbe46a4 100644
--- a/lib/std/os/uefi/tables/system_table.zig
+++ b/lib/std/os/uefi/tables/system_table.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const uefi = @import("std").os.uefi;
 const BootServices = uefi.tables.BootServices;
 const ConfigurationTable = uefi.tables.ConfigurationTable;
diff --git a/lib/std/os/uefi/tables/table_header.zig b/lib/std/os/uefi/tables/table_header.zig
index 8af1895cad8cd98f58b3b10767817b2a51c6936d..d5d40942327ca9f9217d6b0270ddace16f627b1d 100644
--- a/lib/std/os/uefi/tables/table_header.zig
+++ b/lib/std/os/uefi/tables/table_header.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const TableHeader = extern struct {
     signature: u64,
     revision: u32,
diff --git a/lib/std/os/wasi.zig b/lib/std/os/wasi.zig
index e99d2b820b2cab912b2054a8ad21dd1a444c3fb8..708f445ee42b455a71e01bac0ac930bc01e2c21f 100644
--- a/lib/std/os/wasi.zig
+++ b/lib/std/os/wasi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // wasi_snapshot_preview1 spec available (in witx format) here:
 // * typenames -- https://github.com/WebAssembly/WASI/blob/master/phases/snapshot/witx/typenames.witx
 // * module -- https://github.com/WebAssembly/WASI/blob/master/phases/snapshot/witx/wasi_snapshot_preview1.witx
diff --git a/lib/std/os/windows.zig b/lib/std/os/windows.zig
index 04ce43375821a12fbaebaf1d1fcaf6031dfa7a31..6972de597c2e4234c661a8e83653bd35d9bf3510 100644
--- a/lib/std/os/windows.zig
+++ b/lib/std/os/windows.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // This file contains thin wrappers around Windows-specific APIs, with these
 // specific goals in mind:
 // * Convert "errno"-style error codes into Zig errors.
diff --git a/lib/std/os/windows/advapi32.zig b/lib/std/os/windows/advapi32.zig
index 6fa9ae2b45855adad31d0a83f2b5e75fa355cedd..db77c4b7e97657898de24286a2c26fb99f0e460b 100644
--- a/lib/std/os/windows/advapi32.zig
+++ b/lib/std/os/windows/advapi32.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("bits.zig");
 
 pub extern "advapi32" fn RegOpenKeyExW(
diff --git a/lib/std/os/windows/bits.zig b/lib/std/os/windows/bits.zig
index 59a2a8741567b5c72bacffccd69ae1805baeb794..7bc0e131ea1269fa926240b798fb450522485844 100644
--- a/lib/std/os/windows/bits.zig
+++ b/lib/std/os/windows/bits.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Platform-dependent types and values that are used along with OS-specific APIs.
 
 const std = @import("../../std.zig");
diff --git a/lib/std/os/windows/gdi32.zig b/lib/std/os/windows/gdi32.zig
index c91e1d487cab2fea506a21cdb480e27dc48ee7c8..132fd80a34a819edb3b1df04cd2de8f2474194bd 100644
--- a/lib/std/os/windows/gdi32.zig
+++ b/lib/std/os/windows/gdi32.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("bits.zig");
 
 pub const PIXELFORMATDESCRIPTOR = extern struct {
diff --git a/lib/std/os/windows/kernel32.zig b/lib/std/os/windows/kernel32.zig
index a04314324d844a56d91cc8f2e49edcc66f3e431a..6996ad9991ac7c6ffd389fd772a4c84008c7e96d 100644
--- a/lib/std/os/windows/kernel32.zig
+++ b/lib/std/os/windows/kernel32.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("bits.zig");
 
 pub extern "kernel32" fn AddVectoredExceptionHandler(First: c_ulong, Handler: ?VECTORED_EXCEPTION_HANDLER) callconv(WINAPI) ?*c_void;
diff --git a/lib/std/os/windows/lang.zig b/lib/std/os/windows/lang.zig
index 40b363cfae0bd405f58fb4cadd6187e99e85eea3..b173a62a73dc846a2e174031ed54d55da217a5bf 100644
--- a/lib/std/os/windows/lang.zig
+++ b/lib/std/os/windows/lang.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const NEUTRAL = 0x00;
 pub const INVARIANT = 0x7f;
 pub const AFRIKAANS = 0x36;
diff --git a/lib/std/os/windows/ntdll.zig b/lib/std/os/windows/ntdll.zig
index ddc08e4bb22a4af4aa44fa03ee1c30775f3c9ccd..5a0154db6f8cc57bd85adadfa6cf4d1de0a69792 100644
--- a/lib/std/os/windows/ntdll.zig
+++ b/lib/std/os/windows/ntdll.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("bits.zig");
 
 pub extern "NtDll" fn RtlGetVersion(
diff --git a/lib/std/os/windows/ntstatus.zig b/lib/std/os/windows/ntstatus.zig
index 11668a72062641e43815240b9ab2bc3628b5b8f9..41ba3ac81f2668c65d1b5b49b98c963fe4ba32a5 100644
--- a/lib/std/os/windows/ntstatus.zig
+++ b/lib/std/os/windows/ntstatus.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 /// NTSTATUS codes from https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/596a1078-e883-4972-9bbc-49e60bebca55?
 pub const NTSTATUS = enum(u32) {
     /// The caller specified WaitAny for WaitType and one of the dispatcher
diff --git a/lib/std/os/windows/ole32.zig b/lib/std/os/windows/ole32.zig
index bf1eabd63e75cfd03169dba6dc424b7324dcadd6..e4e04326593336fcee8c1ed60c8c2149e3998164 100644
--- a/lib/std/os/windows/ole32.zig
+++ b/lib/std/os/windows/ole32.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("bits.zig");
 
 pub extern "ole32" fn CoTaskMemFree(pv: LPVOID) callconv(WINAPI) void;
diff --git a/lib/std/os/windows/psapi.zig b/lib/std/os/windows/psapi.zig
index 2952df163562923cd06d1636a32679ff96e5a57f..cebe03d3aa1f0753dfd0b43c7e3f85a8221a5dd4 100644
--- a/lib/std/os/windows/psapi.zig
+++ b/lib/std/os/windows/psapi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("bits.zig");
 
 pub extern "psapi" fn EmptyWorkingSet(hProcess: HANDLE) callconv(WINAPI) BOOL;
diff --git a/lib/std/os/windows/shell32.zig b/lib/std/os/windows/shell32.zig
index d184ba10362de9cc80733c5ab92b93f8aec7265d..8739f9301e67447d4bef5e3337e159f224d4eeda 100644
--- a/lib/std/os/windows/shell32.zig
+++ b/lib/std/os/windows/shell32.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("bits.zig");
 
 pub extern "shell32" fn SHGetKnownFolderPath(rfid: *const KNOWNFOLDERID, dwFlags: DWORD, hToken: ?HANDLE, ppszPath: *[*:0]WCHAR) callconv(WINAPI) HRESULT;
diff --git a/lib/std/os/windows/sublang.zig b/lib/std/os/windows/sublang.zig
index ecc46dbfc4e52c32c0942015ac4101f13d5d44f0..e9929c6d79c22fdd1e1f68a041bc1a0a3b23c2e3 100644
--- a/lib/std/os/windows/sublang.zig
+++ b/lib/std/os/windows/sublang.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const NEUTRAL = 0x00;
 pub const DEFAULT = 0x01;
 pub const SYS_DEFAULT = 0x02;
diff --git a/lib/std/os/windows/test.zig b/lib/std/os/windows/test.zig
index 8c18d413ca03c5e8306214d752c96b4f7870db07..8e4d88615c9e6ed9a63d2919322afcda956829e9 100644
--- a/lib/std/os/windows/test.zig
+++ b/lib/std/os/windows/test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2020 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 const builtin = @import("builtin");
 const windows = std.os.windows;
diff --git a/lib/std/os/windows/user32.zig b/lib/std/os/windows/user32.zig
index d996a0f3945941ce0a9acd456552a79c0efe4067..e4511b62d3ab3643a41cb724160ded23cc23521f 100644
--- a/lib/std/os/windows/user32.zig
+++ b/lib/std/os/windows/user32.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("bits.zig");
 const std = @import("std");
 const builtin = std.builtin;
diff --git a/lib/std/os/windows/win32error.zig b/lib/std/os/windows/win32error.zig
index b66d1734cbc6f594e5313b07c64eedf1b7923b88..008316ca1371247b17718e30fa1e743f385dc192 100644
--- a/lib/std/os/windows/win32error.zig
+++ b/lib/std/os/windows/win32error.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Codes are from https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/18d8fbe8-a967-4f1c-ae50-99ca8e491d2d
 pub const Win32Error = enum(u16) {
     /// The operation completed successfully.
diff --git a/lib/std/os/windows/winmm.zig b/lib/std/os/windows/winmm.zig
index 69e4cef605e4cf4cf009dc46661a1c56684d4dab..925905fb46a1ea14fa7726f38585860db75d256b 100644
--- a/lib/std/os/windows/winmm.zig
+++ b/lib/std/os/windows/winmm.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 usingnamespace @import("bits.zig");
 
 pub const MMRESULT = UINT;
diff --git a/lib/std/os/windows/ws2_32.zig b/lib/std/os/windows/ws2_32.zig
index 1aa6daa3e6c60c8c79dd8c70c15a9645f6f6f512..be55966917691e05fc1637d93044c506634b4087 100644
--- a/lib/std/os/windows/ws2_32.zig
+++ b/lib/std/os/windows/ws2_32.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../../std.zig");
 usingnamespace @import("bits.zig");
 
diff --git a/lib/std/packed_int_array.zig b/lib/std/packed_int_array.zig
index 571aae6e4d013afdb17f45fa293366d5dd803068..e6ae58ff186669e2ede31b481490a83856f7627f 100644
--- a/lib/std/packed_int_array.zig
+++ b/lib/std/packed_int_array.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = @import("builtin");
 const debug = std.debug;
diff --git a/lib/std/pdb.zig b/lib/std/pdb.zig
index 30b98941b0661282dc17c07497e726501c94c57b..698407a3a8f5f3131f05e71811e6fba1bf0d999e 100644
--- a/lib/std/pdb.zig
+++ b/lib/std/pdb.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = std.builtin;
 const std = @import("std.zig");
 const io = std.io;
diff --git a/lib/std/priority_dequeue.zig b/lib/std/priority_dequeue.zig
index 81329a0a74c9b37467830c49d94665eacd256829..d154f5df5e216c1980a9616220c584ce9bfc8663 100644
--- a/lib/std/priority_dequeue.zig
+++ b/lib/std/priority_dequeue.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
diff --git a/lib/std/priority_queue.zig b/lib/std/priority_queue.zig
index de68442ea75fa83d2f76b03f3fe0860ed4802049..228c07cadbb3cf5a8bdfc4bbcc2b23e7cbcb445e 100644
--- a/lib/std/priority_queue.zig
+++ b/lib/std/priority_queue.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
diff --git a/lib/std/process.zig b/lib/std/process.zig
index db9f442e565ce1e2c03b78da4e1af5224e4f4b48..f8b986d695f23c5f008a329ad83a6c4ab8702ec8 100644
--- a/lib/std/process.zig
+++ b/lib/std/process.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const builtin = std.builtin;
 const os = std.os;
diff --git a/lib/std/rand.zig b/lib/std/rand.zig
index 7d967d3715e5bafea167dd4f8ac8ec3c305516d1..104be7f692e492636e7634c2cbee9007c7e38c25 100644
--- a/lib/std/rand.zig
+++ b/lib/std/rand.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! The engines provided here should be initialized from an external source.
 //! For a thread-local cryptographically secure pseudo random number generator,
 //! use `std.crypto.random`.
diff --git a/lib/std/rand/Gimli.zig b/lib/std/rand/Gimli.zig
index 8356c7afdee10bb8f77472fe5e3010a31f268c4e..3f1488aa6243d427300bd96a2b8b4e90aa8a482e 100644
--- a/lib/std/rand/Gimli.zig
+++ b/lib/std/rand/Gimli.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! CSPRNG
 
 const std = @import("std");
diff --git a/lib/std/rand/Isaac64.zig b/lib/std/rand/Isaac64.zig
index ec505b0bf6d677eca8e0124c386b2b57c6e9c942..c3821d81aaec037e5d4baa6826a4a86d4caffdc2 100644
--- a/lib/std/rand/Isaac64.zig
+++ b/lib/std/rand/Isaac64.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! ISAAC64 - http://www.burtleburtle.net/bob/rand/isaacafa.html
 //!
 //! Follows the general idea of the implementation from here with a few shortcuts.
diff --git a/lib/std/rand/Pcg.zig b/lib/std/rand/Pcg.zig
index 8f468b5ea397430a37df0b29841a40014728b0f1..5c9789aa7bdf4117fea6c8ddaadf34d215454468 100644
--- a/lib/std/rand/Pcg.zig
+++ b/lib/std/rand/Pcg.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! PCG32 - http://www.pcg-random.org/
 //!
 //! PRNG
diff --git a/lib/std/rand/Sfc64.zig b/lib/std/rand/Sfc64.zig
index 1966a59ceb4c4f8c401a49fcd9e96a33dd98a5ff..5808376e78f5660a0f17913361ac0716ab129b13 100644
--- a/lib/std/rand/Sfc64.zig
+++ b/lib/std/rand/Sfc64.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! Sfc64 pseudo-random number generator from Practically Random.
 //! Fastest engine of pracrand and smallest footprint.
 //! See http://pracrand.sourceforge.net/
diff --git a/lib/std/rand/Xoroshiro128.zig b/lib/std/rand/Xoroshiro128.zig
index 4b507cec74cd64622c6d1c7a589052c7cc97ed93..43dc95afb16ac7e288b6b7e81506201d958d7d24 100644
--- a/lib/std/rand/Xoroshiro128.zig
+++ b/lib/std/rand/Xoroshiro128.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! Xoroshiro128+ - http://xoroshiro.di.unimi.it/
 //!
 //! PRNG
diff --git a/lib/std/rand/Xoshiro256.zig b/lib/std/rand/Xoshiro256.zig
index ead27b0fd1752d5fed2d7fefee2c4bed81e1e677..c95cfc164de8a3b6e38bd6bdc53f5052c16bc60e 100644
--- a/lib/std/rand/Xoshiro256.zig
+++ b/lib/std/rand/Xoshiro256.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 //! Xoshiro256++ - http://xoroshiro.di.unimi.it/
 //!
 //! PRNG
diff --git a/lib/std/rand/ziggurat.zig b/lib/std/rand/ziggurat.zig
index c01f7c659a25a9636c95bdb8c47d8b8fffbc2226..2b9728fa96850d6db6e6ba299840107cb2b56cee 100644
--- a/lib/std/rand/ziggurat.zig
+++ b/lib/std/rand/ziggurat.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Implements ZIGNOR [1].
 //
 // [1]: Jurgen A. Doornik (2005). [*An Improved Ziggurat Method to Generate Normal Random Samples*]
diff --git a/lib/std/sort.zig b/lib/std/sort.zig
index 67a4394b1ebba1709ef7046492f910065461d699..cbc24d9abdc48537b70a6e338e046f2923841937 100644
--- a/lib/std/sort.zig
+++ b/lib/std/sort.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const assert = std.debug.assert;
 const testing = std.testing;
diff --git a/lib/std/special/build_runner.zig b/lib/std/special/build_runner.zig
index 2da273a6738dc687463068cf9fc8edac88cbfd7e..9be6ffa671f35d656cdd60e86e19a2bae32f2219 100644
--- a/lib/std/special/build_runner.zig
+++ b/lib/std/special/build_runner.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const root = @import("@build");
 const std = @import("std");
 const builtin = @import("builtin");
diff --git a/lib/std/special/c.zig b/lib/std/special/c.zig
index a6de965f9047bd2667af9218b3704d41ae9d2be5..d34e7a8a46a8b0d678e2dea1302c548c348e0b36 100644
--- a/lib/std/special/c.zig
+++ b/lib/std/special/c.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // This is Zig's multi-target implementation of libc.
 // When builtin.link_libc is true, we need to export all the functions and
 // provide an entire C API.
diff --git a/lib/std/special/compiler_rt.zig b/lib/std/special/compiler_rt.zig
index 69e099ae57178440fc3ca3c96caeefe316fd513b..27a2ba7a046687f65d9c4f3a4774d2acc1bd3ad8 100644
--- a/lib/std/special/compiler_rt.zig
+++ b/lib/std/special/compiler_rt.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = std.builtin;
 const is_test = builtin.is_test;
diff --git a/lib/std/special/compiler_rt/addXf3.zig b/lib/std/special/compiler_rt/addXf3.zig
index c5c739768040b97fafdfe861913d812d04b41ca2..59e9393ad6c77823090acf085e89848dc012a6b7 100644
--- a/lib/std/special/compiler_rt/addXf3.zig
+++ b/lib/std/special/compiler_rt/addXf3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/blob/02d85149a05cb1f6dc49f0ba7a2ceca53718ae17/compiler-rt/lib/builtins/fp_add_impl.inc
diff --git a/lib/std/special/compiler_rt/addXf3_test.zig b/lib/std/special/compiler_rt/addXf3_test.zig
index 33051ed97007c24750cb9d59e7ce3b74a1f89067..70eb203ceee479f8c8fe5aecee94d1b1f7d518fd 100644
--- a/lib/std/special/compiler_rt/addXf3_test.zig
+++ b/lib/std/special/compiler_rt/addXf3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/blob/02d85149a05cb1f6dc49f0ba7a2ceca53718ae17/compiler-rt/test/builtins/Unit/addtf3_test.c
diff --git a/lib/std/special/compiler_rt/arm.zig b/lib/std/special/compiler_rt/arm.zig
index f100f8293cd05df6a95b13b0074fc96200196b1e..f30d2fd6ec545cba12dfeae26e01b220fb532837 100644
--- a/lib/std/special/compiler_rt/arm.zig
+++ b/lib/std/special/compiler_rt/arm.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // ARM specific builtins
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/ashldi3_test.zig b/lib/std/special/compiler_rt/ashldi3_test.zig
index 4b1eb1f9e4b75966f716e754d9a4d39b60e1aeb3..b69b7a16ad2793ba3145db54cfe3d1784d6bfda9 100644
--- a/lib/std/special/compiler_rt/ashldi3_test.zig
+++ b/lib/std/special/compiler_rt/ashldi3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __ashldi3 = @import("shift.zig").__ashldi3;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/ashlti3_test.zig b/lib/std/special/compiler_rt/ashlti3_test.zig
index 118712045713b9bf24b19a8b207030249b9cdbe6..5ab53c3b78c592773f173b229bcea3128d5612c3 100644
--- a/lib/std/special/compiler_rt/ashlti3_test.zig
+++ b/lib/std/special/compiler_rt/ashlti3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __ashlti3 = @import("shift.zig").__ashlti3;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/ashrdi3_test.zig b/lib/std/special/compiler_rt/ashrdi3_test.zig
index 423c22fc1270a3493eaa4b70160b9c8b7a740f88..c40b9bc054b405fed56112634b4253e00b3a42e6 100644
--- a/lib/std/special/compiler_rt/ashrdi3_test.zig
+++ b/lib/std/special/compiler_rt/ashrdi3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __ashrdi3 = @import("shift.zig").__ashrdi3;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/ashrti3_test.zig b/lib/std/special/compiler_rt/ashrti3_test.zig
index e6d1d7ddbaac2e21a674db603cf666961ce3f965..d456897a27ba6534eee2870fc8a943da6ef2432d 100644
--- a/lib/std/special/compiler_rt/ashrti3_test.zig
+++ b/lib/std/special/compiler_rt/ashrti3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __ashrti3 = @import("shift.zig").__ashrti3;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/atomics.zig b/lib/std/special/compiler_rt/atomics.zig
index 1b592da0196d4ae9281e39674e302f6bd169b63b..b6d0b55e33df049758b3e9c5ce2631c6c799002e 100644
--- a/lib/std/special/compiler_rt/atomics.zig
+++ b/lib/std/special/compiler_rt/atomics.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = std.builtin;
 const arch = std.Target.current.cpu.arch;
diff --git a/lib/std/special/compiler_rt/aulldiv.zig b/lib/std/special/compiler_rt/aulldiv.zig
index 196c218e24299f7312d7bf80f25856b4b472eb83..7709e17e6336c8c54695d26c7169fc0f3de603f6 100644
--- a/lib/std/special/compiler_rt/aulldiv.zig
+++ b/lib/std/special/compiler_rt/aulldiv.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 
 pub fn _alldiv(a: i64, b: i64) callconv(.Stdcall) i64 {
diff --git a/lib/std/special/compiler_rt/aullrem.zig b/lib/std/special/compiler_rt/aullrem.zig
index 7d0eef5921672914acf7dbc0e30e3a603918825a..dbd52cd377ae4c9f6233c27a58caefc4d55c34e9 100644
--- a/lib/std/special/compiler_rt/aullrem.zig
+++ b/lib/std/special/compiler_rt/aullrem.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 
 pub fn _allrem(a: i64, b: i64) callconv(.Stdcall) i64 {
diff --git a/lib/std/special/compiler_rt/clear_cache.zig b/lib/std/special/compiler_rt/clear_cache.zig
index 568373aabe1169ea87f5bd28e1dd95f6d0930a36..033441acdbba3031cfe8c34f5d662a1196b83e75 100644
--- a/lib/std/special/compiler_rt/clear_cache.zig
+++ b/lib/std/special/compiler_rt/clear_cache.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const arch = std.builtin.cpu.arch;
 const os = std.builtin.os.tag;
diff --git a/lib/std/special/compiler_rt/clzsi2.zig b/lib/std/special/compiler_rt/clzsi2.zig
index d7464d5ea9973e45b4105cb4d0a34c8fcd8d2ad4..29ef4bf85e27c57391e8034eb0db5bac4bcb0f18 100644
--- a/lib/std/special/compiler_rt/clzsi2.zig
+++ b/lib/std/special/compiler_rt/clzsi2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = std.builtin;
 
diff --git a/lib/std/special/compiler_rt/clzsi2_test.zig b/lib/std/special/compiler_rt/clzsi2_test.zig
index b7828cf6325601fd95ee1e9d45e5cf8a5c794fc4..c8f6519b5bc948822925dcffec0014439b76016c 100644
--- a/lib/std/special/compiler_rt/clzsi2_test.zig
+++ b/lib/std/special/compiler_rt/clzsi2_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const clzsi2 = @import("clzsi2.zig");
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/compareXf2.zig b/lib/std/special/compiler_rt/compareXf2.zig
index 8a9dcf94923296dc3c236a8c6c84ef4597b3e369..fa7cdfe2a2f1f14146b5be21d3d597739d43568c 100644
--- a/lib/std/special/compiler_rt/compareXf2.zig
+++ b/lib/std/special/compiler_rt/compareXf2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/commit/d674d96bc56c0f377879d01c9d8dfdaaa7859cdb/compiler-rt/lib/builtins/comparesf2.c
diff --git a/lib/std/special/compiler_rt/comparedf2_test.zig b/lib/std/special/compiler_rt/comparedf2_test.zig
index 018d95c0aed3c0512ba258fafbcb85f884cc2b18..a80297ffbfb9438e3be70d937b755a315a7813ed 100644
--- a/lib/std/special/compiler_rt/comparedf2_test.zig
+++ b/lib/std/special/compiler_rt/comparedf2_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/commit/d674d96bc56c0f377879d01c9d8dfdaaa7859cdb/compiler-rt/test/builtins/Unit/comparedf2_test.c
diff --git a/lib/std/special/compiler_rt/comparesf2_test.zig b/lib/std/special/compiler_rt/comparesf2_test.zig
index 10ffc3c063756e3ca07813600c8b96e650aa7487..8bc2c679565f625e20b26a28d3050c69d5c9f851 100644
--- a/lib/std/special/compiler_rt/comparesf2_test.zig
+++ b/lib/std/special/compiler_rt/comparesf2_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/commit/d674d96bc56c0f377879d01c9d8dfdaaa7859cdb/compiler-rt/test/builtins/Unit/comparesf2_test.c
diff --git a/lib/std/special/compiler_rt/divdf3.zig b/lib/std/special/compiler_rt/divdf3.zig
index 10a548090a2bfd6b6c0006f7453ad71f7975d023..b39e428d96881fcb71e38518697d9d54bf9900e7 100644
--- a/lib/std/special/compiler_rt/divdf3.zig
+++ b/lib/std/special/compiler_rt/divdf3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/commit/d674d96bc56c0f377879d01c9d8dfdaaa7859cdb/compiler-rt/lib/builtins/divdf3.c
diff --git a/lib/std/special/compiler_rt/divdf3_test.zig b/lib/std/special/compiler_rt/divdf3_test.zig
index a472b5ed08a2106da4881823268bccbc88ff6548..28cb0bc4dfa5cff50833885aefc392ea936e821f 100644
--- a/lib/std/special/compiler_rt/divdf3_test.zig
+++ b/lib/std/special/compiler_rt/divdf3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/commit/d674d96bc56c0f377879d01c9d8dfdaaa7859cdb/compiler-rt/test/builtins/Unit/divdf3_test.c
diff --git a/lib/std/special/compiler_rt/divsf3.zig b/lib/std/special/compiler_rt/divsf3.zig
index 3f89f123135f1fbf00d50b8a6b39f43c0a690153..b44f19506d356bcb0ce3d2f4bcf0e320fd940ac8 100644
--- a/lib/std/special/compiler_rt/divsf3.zig
+++ b/lib/std/special/compiler_rt/divsf3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/commit/d674d96bc56c0f377879d01c9d8dfdaaa7859cdb/compiler-rt/lib/builtins/divsf3.c
diff --git a/lib/std/special/compiler_rt/divsf3_test.zig b/lib/std/special/compiler_rt/divsf3_test.zig
index 97f34d34a5f0ad65beaab8ae41af3fac57e5e531..0c06d4c15a4eb3d8e81ae483c63b709818404da1 100644
--- a/lib/std/special/compiler_rt/divsf3_test.zig
+++ b/lib/std/special/compiler_rt/divsf3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/commit/d674d96bc56c0f377879d01c9d8dfdaaa7859cdb/compiler-rt/test/builtins/Unit/divsf3_test.c
diff --git a/lib/std/special/compiler_rt/divtf3.zig b/lib/std/special/compiler_rt/divtf3.zig
index d8ef463e490719e942de326f004cbab059a38c18..ea71c7502f91d6436892c58c201db73be8970223 100644
--- a/lib/std/special/compiler_rt/divtf3.zig
+++ b/lib/std/special/compiler_rt/divtf3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/divtf3_test.zig b/lib/std/special/compiler_rt/divtf3_test.zig
index 3915177091fe140addf6f446d77800fb7cef0ebc..f426f827e8ceab480f7c214451756ac36dfa0ce1 100644
--- a/lib/std/special/compiler_rt/divtf3_test.zig
+++ b/lib/std/special/compiler_rt/divtf3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const math = std.math;
 const testing = std.testing;
diff --git a/lib/std/special/compiler_rt/divti3.zig b/lib/std/special/compiler_rt/divti3.zig
index 03bae3f3f836498cc2c793539e89e1f13ed82bce..1fb7947e6f61b14aeac77c8bd734e6b149fb1825 100644
--- a/lib/std/special/compiler_rt/divti3.zig
+++ b/lib/std/special/compiler_rt/divti3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const udivmod = @import("udivmod.zig").udivmod;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/divti3_test.zig b/lib/std/special/compiler_rt/divti3_test.zig
index c4f7fd01b6a52916d9bf40eb753f7b669a7c8e8c..7992e4312fac3c73928b2eab41e18fedbd8d99e4 100644
--- a/lib/std/special/compiler_rt/divti3_test.zig
+++ b/lib/std/special/compiler_rt/divti3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __divti3 = @import("divti3.zig").__divti3;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/emutls.zig b/lib/std/special/compiler_rt/emutls.zig
index d51550c0d5f77d1afaf3659e9ddb35844338b8ea..5d018d84ae54bfcb3039955586bca6b8963fe86b 100644
--- a/lib/std/special/compiler_rt/emutls.zig
+++ b/lib/std/special/compiler_rt/emutls.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2018 LLVM Compiler Infrastructure
-// Copyright (c) 2020 Sebastien Marie <semarie@online.fr>
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // __emutls_get_address specific builtin
 //
 // derived work from LLVM Compiler Infrastructure - release 8.0 (MIT)
diff --git a/lib/std/special/compiler_rt/extendXfYf2.zig b/lib/std/special/compiler_rt/extendXfYf2.zig
index 9a42a938b95b3f860118539e49bf3874853f8743..1c95fd68c1c114e4045a86d05cc6ae26114641be 100644
--- a/lib/std/special/compiler_rt/extendXfYf2.zig
+++ b/lib/std/special/compiler_rt/extendXfYf2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = @import("builtin");
 const is_test = builtin.is_test;
diff --git a/lib/std/special/compiler_rt/extendXfYf2_test.zig b/lib/std/special/compiler_rt/extendXfYf2_test.zig
index 6a53dc5b44d2ebde3c49079e899be36b6ab5f9d6..89545576a206d5c79af50f10983e2b62e93f8603 100644
--- a/lib/std/special/compiler_rt/extendXfYf2_test.zig
+++ b/lib/std/special/compiler_rt/extendXfYf2_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const __extendhfsf2 = @import("extendXfYf2.zig").__extendhfsf2;
 const __extendhftf2 = @import("extendXfYf2.zig").__extendhftf2;
diff --git a/lib/std/special/compiler_rt/fixdfdi.zig b/lib/std/special/compiler_rt/fixdfdi.zig
index f827f22a4a7f7fe9e4d692f8bf680e2b11cc470f..11b50091294ed250563d21e1856efc02a8eee8b3 100644
--- a/lib/std/special/compiler_rt/fixdfdi.zig
+++ b/lib/std/special/compiler_rt/fixdfdi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixint = @import("fixint.zig").fixint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixdfdi_test.zig b/lib/std/special/compiler_rt/fixdfdi_test.zig
index c8220b532d05a7d20490ed61d533f0c1d7502ec2..a9182cb7235da0c2690a4fad14ead8201838483c 100644
--- a/lib/std/special/compiler_rt/fixdfdi_test.zig
+++ b/lib/std/special/compiler_rt/fixdfdi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixdfdi = @import("fixdfdi.zig").__fixdfdi;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixdfsi.zig b/lib/std/special/compiler_rt/fixdfsi.zig
index 2e9fab2297ccb9fe69759a811f618ea145b5dc34..8a6d8da34203bdd102de75614a46610d2ed5efc6 100644
--- a/lib/std/special/compiler_rt/fixdfsi.zig
+++ b/lib/std/special/compiler_rt/fixdfsi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixint = @import("fixint.zig").fixint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixdfsi_test.zig b/lib/std/special/compiler_rt/fixdfsi_test.zig
index c9ebcbeddc9a4d78a41221347496cc2d766f8207..b3f0953160d1b0b42da9a3a770280bace912ca90 100644
--- a/lib/std/special/compiler_rt/fixdfsi_test.zig
+++ b/lib/std/special/compiler_rt/fixdfsi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixdfsi = @import("fixdfsi.zig").__fixdfsi;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixdfti.zig b/lib/std/special/compiler_rt/fixdfti.zig
index 88072de0632ec862b4bb148297610c7b297030c7..0e21f0ba192147cee20614c3c63657ed90dd8baa 100644
--- a/lib/std/special/compiler_rt/fixdfti.zig
+++ b/lib/std/special/compiler_rt/fixdfti.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixint = @import("fixint.zig").fixint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixdfti_test.zig b/lib/std/special/compiler_rt/fixdfti_test.zig
index 76f08f985db70ea04e1e91f2f52d7e98d52bb528..a66dc0eeef3b8658de64e19d73c24a9913352391 100644
--- a/lib/std/special/compiler_rt/fixdfti_test.zig
+++ b/lib/std/special/compiler_rt/fixdfti_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixdfti = @import("fixdfti.zig").__fixdfti;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixint.zig b/lib/std/special/compiler_rt/fixint.zig
index 2947154d203487158feafe72360495139c0e60c9..6ef647410580d358253f53fb29494bb03173c9c6 100644
--- a/lib/std/special/compiler_rt/fixint.zig
+++ b/lib/std/special/compiler_rt/fixint.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const is_test = @import("builtin").is_test;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixint_test.zig b/lib/std/special/compiler_rt/fixint_test.zig
index 86bc32e6424a25069025d5274bb654e55b27436f..e8249813d467fadce6372786cca69fa83bc2f569 100644
--- a/lib/std/special/compiler_rt/fixint_test.zig
+++ b/lib/std/special/compiler_rt/fixint_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const is_test = @import("builtin").is_test;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixsfdi.zig b/lib/std/special/compiler_rt/fixsfdi.zig
index 9563af1a56a949201dc4496e3a2df0ca50505970..d0d958cdd6b310c295307c0644ae56981b79c4aa 100644
--- a/lib/std/special/compiler_rt/fixsfdi.zig
+++ b/lib/std/special/compiler_rt/fixsfdi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixint = @import("fixint.zig").fixint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixsfdi_test.zig b/lib/std/special/compiler_rt/fixsfdi_test.zig
index e18a15d9a363e5f51f51653314b42d15e0a78652..d184f934edb7f1dba429604a9e8d43914a122855 100644
--- a/lib/std/special/compiler_rt/fixsfdi_test.zig
+++ b/lib/std/special/compiler_rt/fixsfdi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixsfdi = @import("fixsfdi.zig").__fixsfdi;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixsfsi.zig b/lib/std/special/compiler_rt/fixsfsi.zig
index f1a32d9f77a2acc17d2e5c67685b845e8549c637..84395d0fa67a8689a3e12f1ed1602d16774eb115 100644
--- a/lib/std/special/compiler_rt/fixsfsi.zig
+++ b/lib/std/special/compiler_rt/fixsfsi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixint = @import("fixint.zig").fixint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixsfsi_test.zig b/lib/std/special/compiler_rt/fixsfsi_test.zig
index 6bc451a697975e3819a1aadd45e5502c5acb04c0..588a76c9d438e6594ac49ccf0a1d75f1cd35d361 100644
--- a/lib/std/special/compiler_rt/fixsfsi_test.zig
+++ b/lib/std/special/compiler_rt/fixsfsi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixsfsi = @import("fixsfsi.zig").__fixsfsi;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixsfti.zig b/lib/std/special/compiler_rt/fixsfti.zig
index 75c0a2fe1d70fe0efeabdf014b7f34b7c647bf06..d7ce4b3a602d6ffe9184e418270404fb3d63ab12 100644
--- a/lib/std/special/compiler_rt/fixsfti.zig
+++ b/lib/std/special/compiler_rt/fixsfti.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixint = @import("fixint.zig").fixint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixsfti_test.zig b/lib/std/special/compiler_rt/fixsfti_test.zig
index 792716d5d3c5b73598ddf14f34fb224d84e71b76..220984a37eb34fd0fa00cf9d3b7fe38a4836f074 100644
--- a/lib/std/special/compiler_rt/fixsfti_test.zig
+++ b/lib/std/special/compiler_rt/fixsfti_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixsfti = @import("fixsfti.zig").__fixsfti;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixtfdi.zig b/lib/std/special/compiler_rt/fixtfdi.zig
index a9e37b777fed5052ca19fa7d75c086a34ac50552..0ef3aa225937ad6b4af07c725efdce8a1cbba70b 100644
--- a/lib/std/special/compiler_rt/fixtfdi.zig
+++ b/lib/std/special/compiler_rt/fixtfdi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixint = @import("fixint.zig").fixint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixtfdi_test.zig b/lib/std/special/compiler_rt/fixtfdi_test.zig
index ef72e6527c873c5a24bafb6d880f061364b409cf..663023a475d20e1a2f3f820a82801baa1d04765c 100644
--- a/lib/std/special/compiler_rt/fixtfdi_test.zig
+++ b/lib/std/special/compiler_rt/fixtfdi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixtfdi = @import("fixtfdi.zig").__fixtfdi;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixtfsi.zig b/lib/std/special/compiler_rt/fixtfsi.zig
index cd92a972c49aaf473777e365907f2b0ee4fe0346..15e89a11b0b0820fda7bd70ead0a3e36d14b3ac8 100644
--- a/lib/std/special/compiler_rt/fixtfsi.zig
+++ b/lib/std/special/compiler_rt/fixtfsi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixint = @import("fixint.zig").fixint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixtfsi_test.zig b/lib/std/special/compiler_rt/fixtfsi_test.zig
index 61a963b07dbef18779cc37be873b80f527ca157a..2e2637f53b3914955abb2dbde91869cf44e453a8 100644
--- a/lib/std/special/compiler_rt/fixtfsi_test.zig
+++ b/lib/std/special/compiler_rt/fixtfsi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixtfsi = @import("fixtfsi.zig").__fixtfsi;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixtfti.zig b/lib/std/special/compiler_rt/fixtfti.zig
index cfae7c249b1069696d4048159bd94cc29e0dfd8c..733fa1eed1b0be8f4b89f480f2144712db3f039f 100644
--- a/lib/std/special/compiler_rt/fixtfti.zig
+++ b/lib/std/special/compiler_rt/fixtfti.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixint = @import("fixint.zig").fixint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixtfti_test.zig b/lib/std/special/compiler_rt/fixtfti_test.zig
index 23ec67a737e4efa4a97c88b6d6a0512ec2ca3534..354e835f2758353ac28d5180bd0cbc31a9e7308b 100644
--- a/lib/std/special/compiler_rt/fixtfti_test.zig
+++ b/lib/std/special/compiler_rt/fixtfti_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixtfti = @import("fixtfti.zig").__fixtfti;
 const std = @import("std");
 const math = std.math;
diff --git a/lib/std/special/compiler_rt/fixuint.zig b/lib/std/special/compiler_rt/fixuint.zig
index 518b5de4e49f0279604a68b2fc6f770b97b58a00..c51b80fbdb0bdf6ab5918f83d3b92effc6e424df 100644
--- a/lib/std/special/compiler_rt/fixuint.zig
+++ b/lib/std/special/compiler_rt/fixuint.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const is_test = @import("builtin").is_test;
 const Log2Int = @import("std").math.Log2Int;
 
diff --git a/lib/std/special/compiler_rt/fixunsdfdi.zig b/lib/std/special/compiler_rt/fixunsdfdi.zig
index 24a88236e002ccc97432180638d5487e55422c6f..800c9b1148ad4d3074dc7b1e9f48cee630e2fd17 100644
--- a/lib/std/special/compiler_rt/fixunsdfdi.zig
+++ b/lib/std/special/compiler_rt/fixunsdfdi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixuint = @import("fixuint.zig").fixuint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixunsdfdi_test.zig b/lib/std/special/compiler_rt/fixunsdfdi_test.zig
index dcccb076d4a8f75afbecc921a445e85f1231b263..59591cf18196208ef2e972ad9c041973fcd7adf6 100644
--- a/lib/std/special/compiler_rt/fixunsdfdi_test.zig
+++ b/lib/std/special/compiler_rt/fixunsdfdi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixunsdfdi = @import("fixunsdfdi.zig").__fixunsdfdi;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/fixunsdfsi.zig b/lib/std/special/compiler_rt/fixunsdfsi.zig
index 416ffc59af32de4781415cdcc485bdd2616026ac..156c21a887b10dea35836310d96435541b22317b 100644
--- a/lib/std/special/compiler_rt/fixunsdfsi.zig
+++ b/lib/std/special/compiler_rt/fixunsdfsi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixuint = @import("fixuint.zig").fixuint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixunsdfsi_test.zig b/lib/std/special/compiler_rt/fixunsdfsi_test.zig
index 059eb208c7f68d78a6e07dd61c50aa5f827ae2bf..b4b7ec8840f423c65e91f64f4e17e8dd9c134a49 100644
--- a/lib/std/special/compiler_rt/fixunsdfsi_test.zig
+++ b/lib/std/special/compiler_rt/fixunsdfsi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixunsdfsi = @import("fixunsdfsi.zig").__fixunsdfsi;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/fixunsdfti.zig b/lib/std/special/compiler_rt/fixunsdfti.zig
index 02836a6f75a6f0af6713dec4dd91405802cd20de..3dcec6bf8987635352c1841137f88f331e9f422a 100644
--- a/lib/std/special/compiler_rt/fixunsdfti.zig
+++ b/lib/std/special/compiler_rt/fixunsdfti.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixuint = @import("fixuint.zig").fixuint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixunsdfti_test.zig b/lib/std/special/compiler_rt/fixunsdfti_test.zig
index 89098afb336e84b8656ed6a93dbee9ddae602767..d9e1424836b9af3572525611160ec8c60ab67429 100644
--- a/lib/std/special/compiler_rt/fixunsdfti_test.zig
+++ b/lib/std/special/compiler_rt/fixunsdfti_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixunsdfti = @import("fixunsdfti.zig").__fixunsdfti;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/fixunssfdi.zig b/lib/std/special/compiler_rt/fixunssfdi.zig
index 77077b4344dd5cc1c0cdc545841e49340f07ad9d..ec00a7ee35c50814414320465012b127eed644b8 100644
--- a/lib/std/special/compiler_rt/fixunssfdi.zig
+++ b/lib/std/special/compiler_rt/fixunssfdi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixuint = @import("fixuint.zig").fixuint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixunssfdi_test.zig b/lib/std/special/compiler_rt/fixunssfdi_test.zig
index 005e005a9b886922da48070b102cef8fc7ee8f7f..3c46511b6de4c3eeb50ad3758815e66907211f97 100644
--- a/lib/std/special/compiler_rt/fixunssfdi_test.zig
+++ b/lib/std/special/compiler_rt/fixunssfdi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixunssfdi = @import("fixunssfdi.zig").__fixunssfdi;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/fixunssfsi.zig b/lib/std/special/compiler_rt/fixunssfsi.zig
index 9c63424629efe14944d72ceb24428a86a1a165b5..a4e5a323f5927e856d9f33e34c1df024145fbad3 100644
--- a/lib/std/special/compiler_rt/fixunssfsi.zig
+++ b/lib/std/special/compiler_rt/fixunssfsi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixuint = @import("fixuint.zig").fixuint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixunssfsi_test.zig b/lib/std/special/compiler_rt/fixunssfsi_test.zig
index 90cb2022309a1d844d342a90d65934d4ec736fb3..4bf90e4bff288093fda7691553721f9f8a90862d 100644
--- a/lib/std/special/compiler_rt/fixunssfsi_test.zig
+++ b/lib/std/special/compiler_rt/fixunssfsi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixunssfsi = @import("fixunssfsi.zig").__fixunssfsi;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/fixunssfti.zig b/lib/std/special/compiler_rt/fixunssfti.zig
index ab5b95ec7f1827d2ce2d92a92090d7a68f0d3b24..dff9eb74980f6136a8af30ea350c3f42d1160ae7 100644
--- a/lib/std/special/compiler_rt/fixunssfti.zig
+++ b/lib/std/special/compiler_rt/fixunssfti.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixuint = @import("fixuint.zig").fixuint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixunssfti_test.zig b/lib/std/special/compiler_rt/fixunssfti_test.zig
index 6dabae8ba84f04f3cdf7043f7be9b30abb4cfec9..3c1a314e91f581b60885568d8684176df88a4609 100644
--- a/lib/std/special/compiler_rt/fixunssfti_test.zig
+++ b/lib/std/special/compiler_rt/fixunssfti_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixunssfti = @import("fixunssfti.zig").__fixunssfti;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/fixunstfdi.zig b/lib/std/special/compiler_rt/fixunstfdi.zig
index 2053b948e0391bf8a7d870e564c698ee40a55f67..907116c1650ee53ba9d5b3417ef5ec6253513be9 100644
--- a/lib/std/special/compiler_rt/fixunstfdi.zig
+++ b/lib/std/special/compiler_rt/fixunstfdi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixuint = @import("fixuint.zig").fixuint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixunstfdi_test.zig b/lib/std/special/compiler_rt/fixunstfdi_test.zig
index ca7a8c8c0dc03400c975427f96838b54ddea355c..aa746799b7248a72172284bdf1e3609af3f4d61b 100644
--- a/lib/std/special/compiler_rt/fixunstfdi_test.zig
+++ b/lib/std/special/compiler_rt/fixunstfdi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixunstfdi = @import("fixunstfdi.zig").__fixunstfdi;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/fixunstfsi.zig b/lib/std/special/compiler_rt/fixunstfsi.zig
index 3c317cd7fe02eebb2ea5080ae39cb633ca4d7cb2..c66a3f18b492a2bfa05a91324dbe5784a5db6847 100644
--- a/lib/std/special/compiler_rt/fixunstfsi.zig
+++ b/lib/std/special/compiler_rt/fixunstfsi.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixuint = @import("fixuint.zig").fixuint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixunstfsi_test.zig b/lib/std/special/compiler_rt/fixunstfsi_test.zig
index f445edb59cab0e78682b3da2b8c0345a5865b9c2..206161bef593ac42f6f16f57d30747d106f36cae 100644
--- a/lib/std/special/compiler_rt/fixunstfsi_test.zig
+++ b/lib/std/special/compiler_rt/fixunstfsi_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixunstfsi = @import("fixunstfsi.zig").__fixunstfsi;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/fixunstfti.zig b/lib/std/special/compiler_rt/fixunstfti.zig
index b089fedd3ff2cc23370e9169e0da5c7b305268e3..1867c69234ba49606f774885efba862449e7dedb 100644
--- a/lib/std/special/compiler_rt/fixunstfti.zig
+++ b/lib/std/special/compiler_rt/fixunstfti.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const fixuint = @import("fixuint.zig").fixuint;
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/fixunstfti_test.zig b/lib/std/special/compiler_rt/fixunstfti_test.zig
index 94ec32302ae969e8d882083cc2c396d3a30437bf..e35e2a65be8923fad90e82cf39461877f6c37b9c 100644
--- a/lib/std/special/compiler_rt/fixunstfti_test.zig
+++ b/lib/std/special/compiler_rt/fixunstfti_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __fixunstfti = @import("fixunstfti.zig").__fixunstfti;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/floatXisf.zig b/lib/std/special/compiler_rt/floatXisf.zig
index 4ce97c98f69eb23b88d760c2771412d99781959b..b02ff5f622e13d2b12f3ff92e9e2391f918545a8 100644
--- a/lib/std/special/compiler_rt/floatXisf.zig
+++ b/lib/std/special/compiler_rt/floatXisf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const std = @import("std");
 const maxInt = std.math.maxInt;
diff --git a/lib/std/special/compiler_rt/floatdidf.zig b/lib/std/special/compiler_rt/floatdidf.zig
index 2e07c91dd56003c2a4e309eb950584df02c2474a..afe9e906fd81533a71072ec193bad214bfb85802 100644
--- a/lib/std/special/compiler_rt/floatdidf.zig
+++ b/lib/std/special/compiler_rt/floatdidf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const std = @import("std");
 
diff --git a/lib/std/special/compiler_rt/floatdidf_test.zig b/lib/std/special/compiler_rt/floatdidf_test.zig
index d20e6b39aa349add2fcb32137099d3bd371aa052..6b01ac5f3f6d425eb7c904a5e7e61e1550922d56 100644
--- a/lib/std/special/compiler_rt/floatdidf_test.zig
+++ b/lib/std/special/compiler_rt/floatdidf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floatdidf = @import("floatdidf.zig").__floatdidf;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/floatdisf_test.zig b/lib/std/special/compiler_rt/floatdisf_test.zig
index a90326e943a55cfc8c3a35a5c7bd0d68b7c94816..010c4faddd6b35542105562b8afc962b55bcc034 100644
--- a/lib/std/special/compiler_rt/floatdisf_test.zig
+++ b/lib/std/special/compiler_rt/floatdisf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floatdisf = @import("floatXisf.zig").__floatdisf;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/floatditf.zig b/lib/std/special/compiler_rt/floatditf.zig
index a06f66e71ea03c06a8943e5726d8211c4d31ec0a..581a0e0532bc45f5348db802f4718b6aced93c44 100644
--- a/lib/std/special/compiler_rt/floatditf.zig
+++ b/lib/std/special/compiler_rt/floatditf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const is_test = builtin.is_test;
 const std = @import("std");
diff --git a/lib/std/special/compiler_rt/floatditf_test.zig b/lib/std/special/compiler_rt/floatditf_test.zig
index bec8384dce1ccda2d133b6ff454c0a077d47771b..cf8a81c68cca4f7408f60cf4f9294827f2e5c152 100644
--- a/lib/std/special/compiler_rt/floatditf_test.zig
+++ b/lib/std/special/compiler_rt/floatditf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floatditf = @import("floatditf.zig").__floatditf;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/floatsiXf.zig b/lib/std/special/compiler_rt/floatsiXf.zig
index 91e52ac50a8306c4aa852f1200e2a95b16808bef..23d5cb1e3c157ed24673ed7287921e42207bae14 100644
--- a/lib/std/special/compiler_rt/floatsiXf.zig
+++ b/lib/std/special/compiler_rt/floatsiXf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const std = @import("std");
 const maxInt = std.math.maxInt;
diff --git a/lib/std/special/compiler_rt/floattidf.zig b/lib/std/special/compiler_rt/floattidf.zig
index 2fa5fee4005bacc3097cbab681f03752273f9c83..6b5013287b9e45f8a8bdc9ea6e5990a68876a029 100644
--- a/lib/std/special/compiler_rt/floattidf.zig
+++ b/lib/std/special/compiler_rt/floattidf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const is_test = builtin.is_test;
 const std = @import("std");
diff --git a/lib/std/special/compiler_rt/floattidf_test.zig b/lib/std/special/compiler_rt/floattidf_test.zig
index 826b73f8a143120bcd96b94650fb22557be72e91..62b131744f30adb1500fd7b4eba013b8b2c8bfc0 100644
--- a/lib/std/special/compiler_rt/floattidf_test.zig
+++ b/lib/std/special/compiler_rt/floattidf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floattidf = @import("floattidf.zig").__floattidf;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/floattisf_test.zig b/lib/std/special/compiler_rt/floattisf_test.zig
index 28df0b54ea5622a3838dbd46d6d2075af07dafaa..30b36c3f9f73296e7542877199aa1cbf1ac79094 100644
--- a/lib/std/special/compiler_rt/floattisf_test.zig
+++ b/lib/std/special/compiler_rt/floattisf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floattisf = @import("floatXisf.zig").__floattisf;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/floattitf.zig b/lib/std/special/compiler_rt/floattitf.zig
index a577b6dc10de42b35d56ce73d4a39f698a4e45f6..90bc241306fe2be609e32800a4362547eaed911c 100644
--- a/lib/std/special/compiler_rt/floattitf.zig
+++ b/lib/std/special/compiler_rt/floattitf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const is_test = builtin.is_test;
 const std = @import("std");
diff --git a/lib/std/special/compiler_rt/floattitf_test.zig b/lib/std/special/compiler_rt/floattitf_test.zig
index cf0aa138a96791af64e0013e6f50501c530645bc..76dfc8fbfcb61e39d65becb46a740df2184e4795 100644
--- a/lib/std/special/compiler_rt/floattitf_test.zig
+++ b/lib/std/special/compiler_rt/floattitf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floattitf = @import("floattitf.zig").__floattitf;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/floatundidf.zig b/lib/std/special/compiler_rt/floatundidf.zig
index e079dabced8f6f5a5cb4eddd669746d60471f6b2..1efe55da4062babf326dfcddc78b84b0137b7d61 100644
--- a/lib/std/special/compiler_rt/floatundidf.zig
+++ b/lib/std/special/compiler_rt/floatundidf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const std = @import("std");
 
diff --git a/lib/std/special/compiler_rt/floatundidf_test.zig b/lib/std/special/compiler_rt/floatundidf_test.zig
index 309439632611c3269beed952e8c455c50e2b5d60..71bfdd3087448214f69689f86cff78e7a44c8e4d 100644
--- a/lib/std/special/compiler_rt/floatundidf_test.zig
+++ b/lib/std/special/compiler_rt/floatundidf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floatundidf = @import("floatundidf.zig").__floatundidf;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/floatundisf.zig b/lib/std/special/compiler_rt/floatundisf.zig
index 23674168471ef4c31ab36c10a828a632c0619071..aca30ee3099204f26419006da9e75ce7ef7613ab 100644
--- a/lib/std/special/compiler_rt/floatundisf.zig
+++ b/lib/std/special/compiler_rt/floatundisf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const std = @import("std");
 const maxInt = std.math.maxInt;
diff --git a/lib/std/special/compiler_rt/floatunditf.zig b/lib/std/special/compiler_rt/floatunditf.zig
index 59c433b372d15cfa35929b44cc825ffb86ef384a..dda5dd6ea523678f026856a7683b6ef16338d17d 100644
--- a/lib/std/special/compiler_rt/floatunditf.zig
+++ b/lib/std/special/compiler_rt/floatunditf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const is_test = builtin.is_test;
 const std = @import("std");
diff --git a/lib/std/special/compiler_rt/floatunditf_test.zig b/lib/std/special/compiler_rt/floatunditf_test.zig
index 20dca4df4e03c088a4bc980c25d323b994753594..ae6834c08231fe7a254331be510bf4939273c26e 100644
--- a/lib/std/special/compiler_rt/floatunditf_test.zig
+++ b/lib/std/special/compiler_rt/floatunditf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floatunditf = @import("floatunditf.zig").__floatunditf;
 
 fn test__floatunditf(a: u64, expected_hi: u64, expected_lo: u64) !void {
diff --git a/lib/std/special/compiler_rt/floatunsidf.zig b/lib/std/special/compiler_rt/floatunsidf.zig
index e3f54e8042905ba480eb11f26e3b99c65df70c60..555d4f5657a364e9105fb9bfaf587d300e39811d 100644
--- a/lib/std/special/compiler_rt/floatunsidf.zig
+++ b/lib/std/special/compiler_rt/floatunsidf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const std = @import("std");
 const maxInt = std.math.maxInt;
diff --git a/lib/std/special/compiler_rt/floatunsisf.zig b/lib/std/special/compiler_rt/floatunsisf.zig
index 1ff11c6388e0d53590e38ac5f0234d7d1af75387..c8a654ff7a7d98da12515a2e3fa04f03fb3dc9bf 100644
--- a/lib/std/special/compiler_rt/floatunsisf.zig
+++ b/lib/std/special/compiler_rt/floatunsisf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const std = @import("std");
 const maxInt = std.math.maxInt;
diff --git a/lib/std/special/compiler_rt/floatunsitf.zig b/lib/std/special/compiler_rt/floatunsitf.zig
index 1220e31b894588786bc8f4887a8b4e8074b4044b..a430471f3a7a953a327d50675d992422ffe84623 100644
--- a/lib/std/special/compiler_rt/floatunsitf.zig
+++ b/lib/std/special/compiler_rt/floatunsitf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const is_test = builtin.is_test;
 const std = @import("std");
diff --git a/lib/std/special/compiler_rt/floatunsitf_test.zig b/lib/std/special/compiler_rt/floatunsitf_test.zig
index a6a446dd4f89998749726eda0748501471c0ea85..7ae7c4328123d3bd67cb0c5d57c9fdec328b05f1 100644
--- a/lib/std/special/compiler_rt/floatunsitf_test.zig
+++ b/lib/std/special/compiler_rt/floatunsitf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floatunsitf = @import("floatunsitf.zig").__floatunsitf;
 
 fn test__floatunsitf(a: u32, expected_hi: u64, expected_lo: u64) !void {
diff --git a/lib/std/special/compiler_rt/floatuntidf.zig b/lib/std/special/compiler_rt/floatuntidf.zig
index 6e1fe3b117c9f1e5a93387e855756bb455b01727..5b5adc04910af64e03de2a12765896f0b2660d2f 100644
--- a/lib/std/special/compiler_rt/floatuntidf.zig
+++ b/lib/std/special/compiler_rt/floatuntidf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const is_test = builtin.is_test;
 const std = @import("std");
diff --git a/lib/std/special/compiler_rt/floatuntidf_test.zig b/lib/std/special/compiler_rt/floatuntidf_test.zig
index 735b5bcdbb5699e332917e15954d9f5e955df731..5fc6a471507d0d4fd608dabcc071461eccf80ad8 100644
--- a/lib/std/special/compiler_rt/floatuntidf_test.zig
+++ b/lib/std/special/compiler_rt/floatuntidf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floatuntidf = @import("floatuntidf.zig").__floatuntidf;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/floatuntisf.zig b/lib/std/special/compiler_rt/floatuntisf.zig
index dd173945bab44736e1fabff6a5b2b4daa5d874b1..33e6e41a84fcb28ecdf21f8d447ba58227208ca9 100644
--- a/lib/std/special/compiler_rt/floatuntisf.zig
+++ b/lib/std/special/compiler_rt/floatuntisf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const is_test = builtin.is_test;
 const std = @import("std");
diff --git a/lib/std/special/compiler_rt/floatuntisf_test.zig b/lib/std/special/compiler_rt/floatuntisf_test.zig
index 5657db1c82219b3165ba2f397116e40739cae630..dd06b7e3d7a27fd28b49e56635358b99da48d276 100644
--- a/lib/std/special/compiler_rt/floatuntisf_test.zig
+++ b/lib/std/special/compiler_rt/floatuntisf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floatuntisf = @import("floatuntisf.zig").__floatuntisf;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/floatuntitf.zig b/lib/std/special/compiler_rt/floatuntitf.zig
index 9759268b93214402e9f4a4e8051131b2950dc15a..0b96076206dbdb69368519a94cd4121032151abf 100644
--- a/lib/std/special/compiler_rt/floatuntitf.zig
+++ b/lib/std/special/compiler_rt/floatuntitf.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const is_test = builtin.is_test;
 const std = @import("std");
diff --git a/lib/std/special/compiler_rt/floatuntitf_test.zig b/lib/std/special/compiler_rt/floatuntitf_test.zig
index 41057aa38c453fa82d6d29bef6a6326366e80990..5afbf348c6e065d14c7ab1546669c610c2d6356b 100644
--- a/lib/std/special/compiler_rt/floatuntitf_test.zig
+++ b/lib/std/special/compiler_rt/floatuntitf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __floatuntitf = @import("floatuntitf.zig").__floatuntitf;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/int.zig b/lib/std/special/compiler_rt/int.zig
index 4533d10ab9bad24cc21834de6182cdcafa2c0452..e4d9df7a22c1b4825229b9d8ab1bb3640c68052f 100644
--- a/lib/std/special/compiler_rt/int.zig
+++ b/lib/std/special/compiler_rt/int.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Builtin functions that operate on integer types
 const builtin = @import("builtin");
 const testing = @import("std").testing;
diff --git a/lib/std/special/compiler_rt/lshrdi3_test.zig b/lib/std/special/compiler_rt/lshrdi3_test.zig
index 1e3270711e6452de113441deafa92562f7d61051..acae7a999a9451cec8f3b0702a761134dc5d81bc 100644
--- a/lib/std/special/compiler_rt/lshrdi3_test.zig
+++ b/lib/std/special/compiler_rt/lshrdi3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __lshrdi3 = @import("shift.zig").__lshrdi3;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/lshrti3_test.zig b/lib/std/special/compiler_rt/lshrti3_test.zig
index 3cb134f777dab9dafdf16cb8a7a64d6bcf9a35b2..a7db70024e2eb9f44184f2c9c594472afbc41533 100644
--- a/lib/std/special/compiler_rt/lshrti3_test.zig
+++ b/lib/std/special/compiler_rt/lshrti3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __lshrti3 = @import("shift.zig").__lshrti3;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/modti3.zig b/lib/std/special/compiler_rt/modti3.zig
index 298a488dc221b3177f5630d92780070e39ba1dc0..915b2b95668c629be3a720fa21d8688673bb8c6c 100644
--- a/lib/std/special/compiler_rt/modti3.zig
+++ b/lib/std/special/compiler_rt/modti3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/blob/2ffb1b0413efa9a24eb3c49e710e36f92e2cb50b/compiler-rt/lib/builtins/modti3.c
diff --git a/lib/std/special/compiler_rt/modti3_test.zig b/lib/std/special/compiler_rt/modti3_test.zig
index e0539417300982ff54ea55ca7d47bcdb7108fe41..c7cee57f8bea6c473a9052335f807db4b49bbe74 100644
--- a/lib/std/special/compiler_rt/modti3_test.zig
+++ b/lib/std/special/compiler_rt/modti3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __modti3 = @import("modti3.zig").__modti3;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/mulXf3.zig b/lib/std/special/compiler_rt/mulXf3.zig
index 20828badd3846185ffe28377e2e5cad954d9875f..f050cb1711bb6dabb826c576be17b607eaa1194c 100644
--- a/lib/std/special/compiler_rt/mulXf3.zig
+++ b/lib/std/special/compiler_rt/mulXf3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/blob/2ffb1b0413efa9a24eb3c49e710e36f92e2cb50b/compiler-rt/lib/builtins/fp_mul_impl.inc
diff --git a/lib/std/special/compiler_rt/mulXf3_test.zig b/lib/std/special/compiler_rt/mulXf3_test.zig
index 2de681b067664684202bb8ac7524a2e1fcda4d05..396b69bcd0de7f6b3088ce693595965eeff78a03 100644
--- a/lib/std/special/compiler_rt/mulXf3_test.zig
+++ b/lib/std/special/compiler_rt/mulXf3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Ported from:
 //
 // https://github.com/llvm/llvm-project/blob/2ffb1b0413efa9a24eb3c49e710e36f92e2cb50b/compiler-rt/test/builtins/Unit/multf3_test.c
diff --git a/lib/std/special/compiler_rt/muldi3.zig b/lib/std/special/compiler_rt/muldi3.zig
index d367721cb261a628c933a15088dd80c272940763..359484da09aaefcf17897da7fd4811d2838bbf8e 100644
--- a/lib/std/special/compiler_rt/muldi3.zig
+++ b/lib/std/special/compiler_rt/muldi3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const is_test = std.builtin.is_test;
 const native_endian = std.Target.current.cpu.arch.endian();
diff --git a/lib/std/special/compiler_rt/muldi3_test.zig b/lib/std/special/compiler_rt/muldi3_test.zig
index 914e42bd15d04664d594794bd59e28dade509e15..6e005d67c86be3476f719f8cb859e1a3b98414aa 100644
--- a/lib/std/special/compiler_rt/muldi3_test.zig
+++ b/lib/std/special/compiler_rt/muldi3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __muldi3 = @import("muldi3.zig").__muldi3;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/mulodi4.zig b/lib/std/special/compiler_rt/mulodi4.zig
index ed90b4d38263ba2495549e56d1fb4fc3e0cb54a2..94ed6752cc087302b0961e2213ccf82c83042907 100644
--- a/lib/std/special/compiler_rt/mulodi4.zig
+++ b/lib/std/special/compiler_rt/mulodi4.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const compiler_rt = @import("../compiler_rt.zig");
 const maxInt = std.math.maxInt;
diff --git a/lib/std/special/compiler_rt/mulodi4_test.zig b/lib/std/special/compiler_rt/mulodi4_test.zig
index c865b7a0c523ff3b03d5994b112bab92137bec17..b9fea2553f1d158d9875ac2cc58caa3da49af38c 100644
--- a/lib/std/special/compiler_rt/mulodi4_test.zig
+++ b/lib/std/special/compiler_rt/mulodi4_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __mulodi4 = @import("mulodi4.zig").__mulodi4;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/muloti4.zig b/lib/std/special/compiler_rt/muloti4.zig
index 30054ac7513f05c9625eedd80c8c34139abf3efd..b36a32666a5095af44f164ecd9cf7e668685dd9c 100644
--- a/lib/std/special/compiler_rt/muloti4.zig
+++ b/lib/std/special/compiler_rt/muloti4.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const compiler_rt = @import("../compiler_rt.zig");
 
diff --git a/lib/std/special/compiler_rt/muloti4_test.zig b/lib/std/special/compiler_rt/muloti4_test.zig
index 34c1d2daab42b4c4e7b28f9f7ed4cf520b16f08a..08450797fad9f0e04f94ac996c42128d9ac0aafc 100644
--- a/lib/std/special/compiler_rt/muloti4_test.zig
+++ b/lib/std/special/compiler_rt/muloti4_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __muloti4 = @import("muloti4.zig").__muloti4;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/multi3.zig b/lib/std/special/compiler_rt/multi3.zig
index e0e992835f81165e18068aed90d21f31d007ffdb..47343613300e870f94755647067b217a3b33d98d 100644
--- a/lib/std/special/compiler_rt/multi3.zig
+++ b/lib/std/special/compiler_rt/multi3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const compiler_rt = @import("../compiler_rt.zig");
 const std = @import("std");
 const is_test = std.builtin.is_test;
diff --git a/lib/std/special/compiler_rt/multi3_test.zig b/lib/std/special/compiler_rt/multi3_test.zig
index a9ac76009975ffb64483dba8122d5b2b77ce43ff..e9eafc05dead09bcbdb607586d968724e256fa1c 100644
--- a/lib/std/special/compiler_rt/multi3_test.zig
+++ b/lib/std/special/compiler_rt/multi3_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __multi3 = @import("multi3.zig").__multi3;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/negXf2.zig b/lib/std/special/compiler_rt/negXf2.zig
index 8c7010cccb435b9bf824505037e2d8cd8110f5cb..06528b75706d27119b7d02bd2721b39cc5501012 100644
--- a/lib/std/special/compiler_rt/negXf2.zig
+++ b/lib/std/special/compiler_rt/negXf2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 
 pub fn __negsf2(a: f32) callconv(.C) f32 {
diff --git a/lib/std/special/compiler_rt/popcountdi2.zig b/lib/std/special/compiler_rt/popcountdi2.zig
index 8495068339fee3b4b318d5a61d44155399989dac..b7e7220c7b8c109ab8f49e74d1b0e067e561c0fd 100644
--- a/lib/std/special/compiler_rt/popcountdi2.zig
+++ b/lib/std/special/compiler_rt/popcountdi2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const compiler_rt = @import("../compiler_rt.zig");
 
diff --git a/lib/std/special/compiler_rt/popcountdi2_test.zig b/lib/std/special/compiler_rt/popcountdi2_test.zig
index 056b9827efef12301ad6130d6c6b5ec2eb08b72e..736d04dac1454de6a77a0e657a2dfed2bf34c81f 100644
--- a/lib/std/special/compiler_rt/popcountdi2_test.zig
+++ b/lib/std/special/compiler_rt/popcountdi2_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __popcountdi2 = @import("popcountdi2.zig").__popcountdi2;
 const testing = @import("std").testing;
 
diff --git a/lib/std/special/compiler_rt/shift.zig b/lib/std/special/compiler_rt/shift.zig
index e1a1a0489340525b1508b579ea72b31f940ccbc9..28109ce9cd7bc9d12c795f62c7a8ec9cb7359ee8 100644
--- a/lib/std/special/compiler_rt/shift.zig
+++ b/lib/std/special/compiler_rt/shift.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const Log2Int = std.math.Log2Int;
 const native_endian = std.Target.current.cpu.arch.endian();
diff --git a/lib/std/special/compiler_rt/sparc.zig b/lib/std/special/compiler_rt/sparc.zig
index 12c9de888ab6faff4a63d08547183b1b20bb4a4e..3f2cbd86b5a365d668be08a75fd7d574a70ac5f1 100644
--- a/lib/std/special/compiler_rt/sparc.zig
+++ b/lib/std/special/compiler_rt/sparc.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2020 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //
 // SPARC uses a different naming scheme for its support routines so we map it here to the x86 name.
 
diff --git a/lib/std/special/compiler_rt/stack_probe.zig b/lib/std/special/compiler_rt/stack_probe.zig
index f35afc3a6aa9b185b0d179ed5cfc2bf8b995421f..78f8a2f8bfa730b91810e6d4cdb5b233d1eb7df7 100644
--- a/lib/std/special/compiler_rt/stack_probe.zig
+++ b/lib/std/special/compiler_rt/stack_probe.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const native_arch = @import("std").Target.current.cpu.arch;
 
 // Zig's own stack-probe routine (available only on x86 and x86_64)
diff --git a/lib/std/special/compiler_rt/truncXfYf2.zig b/lib/std/special/compiler_rt/truncXfYf2.zig
index 9f34812199f346d65e9d152eed0060ef43e4b55f..737d0e330f8cfba898b92b7fc407e21999b4524a 100644
--- a/lib/std/special/compiler_rt/truncXfYf2.zig
+++ b/lib/std/special/compiler_rt/truncXfYf2.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 
 pub fn __truncsfhf2(a: f32) callconv(.C) u16 {
diff --git a/lib/std/special/compiler_rt/truncXfYf2_test.zig b/lib/std/special/compiler_rt/truncXfYf2_test.zig
index 9e581fd636c59e8d2d06cc23d117fd894fd59853..23c83afd9fa7af739dff4ef34e140c11778abcfd 100644
--- a/lib/std/special/compiler_rt/truncXfYf2_test.zig
+++ b/lib/std/special/compiler_rt/truncXfYf2_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const __truncsfhf2 = @import("truncXfYf2.zig").__truncsfhf2;
 
 fn test__truncsfhf2(a: u32, expected: u16) !void {
diff --git a/lib/std/special/compiler_rt/udivmod.zig b/lib/std/special/compiler_rt/udivmod.zig
index badfd97ad8a31915f26aaebd9ba5b8276bf0ebfd..3d9618f797949091fae9b6dc83716deb3d471ebc 100644
--- a/lib/std/special/compiler_rt/udivmod.zig
+++ b/lib/std/special/compiler_rt/udivmod.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const is_test = builtin.is_test;
 const native_endian = @import("std").Target.current.cpu.arch.endian();
diff --git a/lib/std/special/compiler_rt/udivmoddi4_test.zig b/lib/std/special/compiler_rt/udivmoddi4_test.zig
index edc07bc1dbe6fcf848d3f81e1d4eb7956c8da23a..2861d33b3c39f7f603cf8e9b9b62fe2c437bcf57 100644
--- a/lib/std/special/compiler_rt/udivmoddi4_test.zig
+++ b/lib/std/special/compiler_rt/udivmoddi4_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Disable formatting to avoid unnecessary source repository bloat.
 // zig fmt: off
 const __udivmoddi4 = @import("int.zig").__udivmoddi4;
diff --git a/lib/std/special/compiler_rt/udivmodti4.zig b/lib/std/special/compiler_rt/udivmodti4.zig
index 310f4dce42f009839976ff09d65fb90c836bde52..cc1141dbbca1e8f7faa7dab8ec4516602db04c0c 100644
--- a/lib/std/special/compiler_rt/udivmodti4.zig
+++ b/lib/std/special/compiler_rt/udivmodti4.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const udivmod = @import("udivmod.zig").udivmod;
 const builtin = @import("builtin");
 const compiler_rt = @import("../compiler_rt.zig");
diff --git a/lib/std/special/compiler_rt/udivmodti4_test.zig b/lib/std/special/compiler_rt/udivmodti4_test.zig
index 5d39470f53d09ef57c7edb5ea80d52a340c685e5..cb05500bee95b1f3841d0e9cc1e757d2f7dfb16d 100644
--- a/lib/std/special/compiler_rt/udivmodti4_test.zig
+++ b/lib/std/special/compiler_rt/udivmodti4_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // Disable formatting to avoid unnecessary source repository bloat.
 // zig fmt: off
 const __udivmodti4 = @import("udivmodti4.zig").__udivmodti4;
diff --git a/lib/std/special/compiler_rt/udivti3.zig b/lib/std/special/compiler_rt/udivti3.zig
index 8d95624edcadcf82b33128cb3c7f613319ff0d87..52afa0420f5d6dd8a7ca92e80491589c3e56c32a 100644
--- a/lib/std/special/compiler_rt/udivti3.zig
+++ b/lib/std/special/compiler_rt/udivti3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const udivmodti4 = @import("udivmodti4.zig");
 const builtin = @import("builtin");
 
diff --git a/lib/std/special/compiler_rt/umodti3.zig b/lib/std/special/compiler_rt/umodti3.zig
index 98160039a1c82f2d66fa14fe2ef0f656864c0c56..29eb572892b404f7e81599a79e47e9563b50de06 100644
--- a/lib/std/special/compiler_rt/umodti3.zig
+++ b/lib/std/special/compiler_rt/umodti3.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const udivmodti4 = @import("udivmodti4.zig");
 const builtin = @import("builtin");
 const compiler_rt = @import("../compiler_rt.zig");
diff --git a/lib/std/special/ssp.zig b/lib/std/special/ssp.zig
index 6eda11b2e2fa02cbdad9a1dbb46380db5990a097..7bc5cef8139637f84b5c13a732f8894b977c7770 100644
--- a/lib/std/special/ssp.zig
+++ b/lib/std/special/ssp.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //
 // Small Zig reimplementation of gcc's libssp.
 //
diff --git a/lib/std/special/test_runner.zig b/lib/std/special/test_runner.zig
index f8411c036bdbb4ec2bd9f18867c0177b56e86948..4ca627d133ec6489e6ecfca233e23b350272f8e6 100644
--- a/lib/std/special/test_runner.zig
+++ b/lib/std/special/test_runner.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const io = std.io;
 const builtin = @import("builtin");
diff --git a/lib/std/start.zig b/lib/std/start.zig
index b8e26869f010e14bb86bdd82471280007ef7f860..a3035231df909033314aefff98d5541ac5b3d8cb 100644
--- a/lib/std/start.zig
+++ b/lib/std/start.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 // This file is included in the compilation unit when exporting an executable.
 
 const root = @import("root");
diff --git a/lib/std/start_windows_tls.zig b/lib/std/start_windows_tls.zig
index 354a10c2612c0f5dd15a4da58edf36a406fb25eb..4b6db8bb4810d04d81ec757113d319154e4a16a7 100644
--- a/lib/std/start_windows_tls.zig
+++ b/lib/std/start_windows_tls.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = @import("builtin");
 
diff --git a/lib/std/std.zig b/lib/std/std.zig
index d4545717742f2cb68881fe4fbbcbb29651401f23..39991ce305b3548e2235064b61beab501671fc82 100644
--- a/lib/std/std.zig
+++ b/lib/std/std.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 pub const ArrayHashMap = array_hash_map.ArrayHashMap;
 pub const ArrayHashMapUnmanaged = array_hash_map.ArrayHashMapUnmanaged;
 pub const ArrayList = @import("array_list.zig").ArrayList;
diff --git a/lib/std/target.zig b/lib/std/target.zig
index 1b9f0084c83a1e3c792a5e75290b395c8365212d..c94b7a4386746efabbc15db54028e491566c84a1 100644
--- a/lib/std/target.zig
+++ b/lib/std/target.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const mem = std.mem;
 const builtin = std.builtin;
diff --git a/lib/std/testing.zig b/lib/std/testing.zig
index 3323ee239b71296cf2fb2d48d7ed35333caa65b6..ae3757b5138e2c925bd9f3c7beaa8f48563e7fa0 100644
--- a/lib/std/testing.zig
+++ b/lib/std/testing.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 
 const math = std.math;
diff --git a/lib/std/testing/failing_allocator.zig b/lib/std/testing/failing_allocator.zig
index 570050762d43f659f012299ddffeb04560cd1065..d8b243d0fae5172d4421fc58cf654098348f060f 100644
--- a/lib/std/testing/failing_allocator.zig
+++ b/lib/std/testing/failing_allocator.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const mem = std.mem;
 
diff --git a/lib/std/time.zig b/lib/std/time.zig
index a0430049cfae48854f2b4d3c8319c87dc6142bcc..23065307533fcf29b8c8d61bfd29e6f7cc03bf5e 100644
--- a/lib/std/time.zig
+++ b/lib/std/time.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const builtin = std.builtin;
 const assert = std.debug.assert;
diff --git a/lib/std/time/epoch.zig b/lib/std/time/epoch.zig
index 75bddc71c390bb1f1f1c8dcb9b17ae79daac80ec..126c4fceb7386266e28102644dd65ed53e84bcbf 100644
--- a/lib/std/time/epoch.zig
+++ b/lib/std/time/epoch.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 //! Epoch reference times in terms of their difference from
 //! UTC 1970-01-01 in seconds.
 
diff --git a/lib/std/unicode.zig b/lib/std/unicode.zig
index eddc2cb7ec273b70791a8e59ea11ef5f27b78bdf..b93b5e361f9a21cbdef2e91841002562d74bb541 100644
--- a/lib/std/unicode.zig
+++ b/lib/std/unicode.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("./std.zig");
 const builtin = std.builtin;
 const assert = std.debug.assert;
diff --git a/lib/std/unicode/throughput_test.zig b/lib/std/unicode/throughput_test.zig
index e49da8ceaf89c1ec9b71498c8513641c8d00826b..2117564961cbe0d9ff44e637b624f54089f631ef 100644
--- a/lib/std/unicode/throughput_test.zig
+++ b/lib/std/unicode/throughput_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const builtin = std.builtin;
 const time = std.time;
diff --git a/lib/std/valgrind.zig b/lib/std/valgrind.zig
index d149e56f493e3b2fb89a958a80d833347d09efba..b8ca05a4c7276023fe7cab5a13ee1300abb0f527 100644
--- a/lib/std/valgrind.zig
+++ b/lib/std/valgrind.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const builtin = @import("builtin");
 const std = @import("std.zig");
 const math = std.math;
diff --git a/lib/std/valgrind/callgrind.zig b/lib/std/valgrind/callgrind.zig
index d29e1903fb3444b3ca91c078d3aa682d1312ba9d..6c7dadf1e196d2870f9a03a10196cf0125eedb46 100644
--- a/lib/std/valgrind/callgrind.zig
+++ b/lib/std/valgrind/callgrind.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const valgrind = std.valgrind;
 
diff --git a/lib/std/valgrind/memcheck.zig b/lib/std/valgrind/memcheck.zig
index 41657c8a664be01d14e7acf00c98237136241d98..489abac2f65de7364d93f18f4792bd35d7cf0bbc 100644
--- a/lib/std/valgrind/memcheck.zig
+++ b/lib/std/valgrind/memcheck.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const testing = std.testing;
 const valgrind = std.valgrind;
diff --git a/lib/std/wasm.zig b/lib/std/wasm.zig
index aebbb3b163ef32858cd970ba62d3ba08bbbc995a..b7923fd0151faa6dee7a38250e16ebfe50967a91 100644
--- a/lib/std/wasm.zig
+++ b/lib/std/wasm.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const testing = @import("std.zig").testing;
 
 // TODO: Add support for multi-byte ops (e.g. table operations)
diff --git a/lib/std/x.zig b/lib/std/x.zig
index 3ac8b10f4a04a4baa7c6cca9559ba9afd6f7ee62..be0ab25e7a67bd0630a4f25e9205d280c22b0825 100644
--- a/lib/std/x.zig
+++ b/lib/std/x.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std.zig");
 
 pub const os = struct {
diff --git a/lib/std/x/net/ip.zig b/lib/std/x/net/ip.zig
index 409a8ebadfc595bcb52a2daae0a2d8bd0218e794..a3f5dfecf6ee310a69345eec9020acadf0f0c63f 100644
--- a/lib/std/x/net/ip.zig
+++ b/lib/std/x/net/ip.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../../std.zig");
 
 const fmt = std.fmt;
diff --git a/lib/std/x/net/tcp.zig b/lib/std/x/net/tcp.zig
index 25efbae67310989284f480dc4ca1ec3248f5085a..5e02b68e9c922f755b260e8602ab98b983e398da 100644
--- a/lib/std/x/net/tcp.zig
+++ b/lib/std/x/net/tcp.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../../std.zig");
 
 const io = std.io;
diff --git a/lib/std/x/os/net.zig b/lib/std/x/os/net.zig
index d94692693257a4947994acb44020c8d854647ee1..cca9bc0ffa665ec80c2b24d152ee878400b929ab 100644
--- a/lib/std/x/os/net.zig
+++ b/lib/std/x/os/net.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../../std.zig");
 
 const os = std.os;
diff --git a/lib/std/x/os/socket.zig b/lib/std/x/os/socket.zig
index 9da74d5b0ea26306a5d3e42f39de0d4c2f196c2a..33fc4971d752d7584bca2fa94a07e18b025a75b5 100644
--- a/lib/std/x/os/socket.zig
+++ b/lib/std/x/os/socket.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../../std.zig");
 const net = @import("net.zig");
 
diff --git a/lib/std/x/os/socket_posix.zig b/lib/std/x/os/socket_posix.zig
index 59e4b177f71817406ef851a293b3e4d83df17542..895d4c80017a1e813ff2a809057dd826a8435f6e 100644
--- a/lib/std/x/os/socket_posix.zig
+++ b/lib/std/x/os/socket_posix.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../../std.zig");
 
 const os = std.os;
diff --git a/lib/std/x/os/socket_windows.zig b/lib/std/x/os/socket_windows.zig
index c08931fedf01c3d270137cdcec3be512da0fdf19..bcc722fcfe9cb8d4fbb13ad13a879645ed434ec9 100644
--- a/lib/std/x/os/socket_windows.zig
+++ b/lib/std/x/os/socket_windows.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("../../std.zig");
 const net = @import("net.zig");
 
diff --git a/lib/std/zig.zig b/lib/std/zig.zig
index 303c930b93829577311e29aac95be87f55d03034..85ad4d2c81f355d365b9a7316e60bbb30ed2955a 100644
--- a/lib/std/zig.zig
+++ b/lib/std/zig.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std.zig");
 const tokenizer = @import("zig/tokenizer.zig");
 const fmt = @import("zig/fmt.zig");
diff --git a/lib/std/zig/ast.zig b/lib/std/zig/ast.zig
index 61969d96993f2ad88b3c855adf22c0912c89978b..ee2b0982a9feab44d0ddcb27a601846dd8c160ec 100644
--- a/lib/std/zig/ast.zig
+++ b/lib/std/zig/ast.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 const testing = std.testing;
diff --git a/lib/std/zig/c_builtins.zig b/lib/std/zig/c_builtins.zig
index 479f7a3b0e4b624673b31ca6c54cf0939a096df7..6d7dc52bb89935911ef3fc420c451ad36d6756e2 100644
--- a/lib/std/zig/c_builtins.zig
+++ b/lib/std/zig/c_builtins.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 
 pub inline fn __builtin_bswap16(val: u16) u16 {
diff --git a/lib/std/zig/c_translation.zig b/lib/std/zig/c_translation.zig
index 7b21fba93ab2d9c0ee3997a09ca49910f0a7e183..bb8a699f69abe0162b3ef5eb2ca5bc661f85cf0d 100644
--- a/lib/std/zig/c_translation.zig
+++ b/lib/std/zig/c_translation.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 const std = @import("std");
 const testing = std.testing;
 const math = std.math;
diff --git a/lib/std/zig/cross_target.zig b/lib/std/zig/cross_target.zig
index 4a8879db57a3288d4387b41d6d86e696c90e3b5b..5243d0eb9db5941545fac42ce45633a5c47432a0 100644
--- a/lib/std/zig/cross_target.zig
+++ b/lib/std/zig/cross_target.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 const Target = std.Target;
diff --git a/lib/std/zig/parse.zig b/lib/std/zig/parse.zig
index 24c34a95363103fe13900c113e8da9693556e488..922b1e9858c094d47703b3b81270c7a195df5001 100644
--- a/lib/std/zig/parse.zig
+++ b/lib/std/zig/parse.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 const Allocator = std.mem.Allocator;
diff --git a/lib/std/zig/parser_test.zig b/lib/std/zig/parser_test.zig
index f67b0c61791299f47a6908938a6ea531b4d9e258..fed63ba21f1ac01269606230c088f8f4d1074583 100644
--- a/lib/std/zig/parser_test.zig
+++ b/lib/std/zig/parser_test.zig
@@ -1,9 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
-
 test "zig fmt: preserves clobbers in inline asm with stray comma" {
     try testTransform(
         \\fn foo() void {
diff --git a/lib/std/zig/perf_test.zig b/lib/std/zig/perf_test.zig
index 49a19a067cb1356b46094edd5a9f6f5aaef79171..00292507994bf07028f0c99158e4db69ef612a25 100644
--- a/lib/std/zig/perf_test.zig
+++ b/lib/std/zig/perf_test.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const mem = std.mem;
 const warn = std.debug.warn;
diff --git a/lib/std/zig/render.zig b/lib/std/zig/render.zig
index df91da8a0304aff4a30e330ce4c8e7b2fad3d87c..20ec7d3bfa688e4273e559f4c3e7f80d3f536961 100644
--- a/lib/std/zig/render.zig
+++ b/lib/std/zig/render.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 const mem = std.mem;
diff --git a/lib/std/zig/string_literal.zig b/lib/std/zig/string_literal.zig
index b1dc53c47f4127a395a31104d8ed997e439053a3..64242038d3be5accfebf1dc361bf5a50f95ca813 100644
--- a/lib/std/zig/string_literal.zig
+++ b/lib/std/zig/string_literal.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const assert = std.debug.assert;
 
diff --git a/lib/std/zig/system.zig b/lib/std/zig/system.zig
index c5c62911ccf85a8cc62802a0034b06049c397427..a2a92b39df97e380001d76d021068b5a93afd128 100644
--- a/lib/std/zig/system.zig
+++ b/lib/std/zig/system.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const elf = std.elf;
 const mem = std.mem;
diff --git a/lib/std/zig/system/darwin.zig b/lib/std/zig/system/darwin.zig
index 1e8d9e4b48ea29f9bba7b073f23da615dba9cdb4..30496e7d26dfd699726fab6a113ed06307e58722 100644
--- a/lib/std/zig/system/darwin.zig
+++ b/lib/std/zig/system/darwin.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const mem = std.mem;
 const Allocator = mem.Allocator;
diff --git a/lib/std/zig/system/darwin/macos.zig b/lib/std/zig/system/darwin/macos.zig
index c8f48800c548a374d919bf5c4644f1d3620791a6..509faaef290ba288a500544458ddeabf3dbcf732 100644
--- a/lib/std/zig/system/darwin/macos.zig
+++ b/lib/std/zig/system/darwin/macos.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const assert = std.debug.assert;
 const mem = std.mem;
diff --git a/lib/std/zig/system/windows.zig b/lib/std/zig/system/windows.zig
index d32b28f60719549f5b94d5145cf615c6afc89002..595dac627882d247191a6f5d8cb9a3aa751b9a0d 100644
--- a/lib/std/zig/system/windows.zig
+++ b/lib/std/zig/system/windows.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2020 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 
 pub const WindowsVersion = std.Target.Os.WindowsVersion;
diff --git a/lib/std/zig/system/x86.zig b/lib/std/zig/system/x86.zig
index 1d9a22d5d20a8a4a2d7c4facb6a6276414080abe..06a11c81ae15918b84c21ed02f7d341735e5ffb4 100644
--- a/lib/std/zig/system/x86.zig
+++ b/lib/std/zig/system/x86.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("std");
 const Target = std.Target;
 const CrossTarget = std.zig.CrossTarget;
diff --git a/lib/std/zig/tokenizer.zig b/lib/std/zig/tokenizer.zig
index 3008aecdc35852d6c3cfca64c46e184a7610239e..1db2967c52f8f90b7f3904b1b582db0670f42cfc 100644
--- a/lib/std/zig/tokenizer.zig
+++ b/lib/std/zig/tokenizer.zig
@@ -1,8 +1,3 @@
-// SPDX-License-Identifier: MIT
-// Copyright (c) 2015-2021 Zig Contributors
-// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
-// The MIT license requires this copyright notice to be included in all copies
-// and substantial portions of the software.
 const std = @import("../std.zig");
 const mem = std.mem;
 
diff --git a/tools/update-license-headers.zig b/tools/update-license-headers.zig
new file mode 100644
index 0000000000000000000000000000000000000000..4cc60ca4ea8f95d2c3b1d9a3e778836873852f81
--- /dev/null
+++ b/tools/update-license-headers.zig
@@ -0,0 +1,47 @@
+const std = @import("std");
+
+/// This script replaces a matching license header from .zig source files in a directory tree
+/// with the `new_header` below.
+const new_header = "";
+
+pub fn main() !void {
+    var progress = std.Progress{};
+    const root_node = try progress.start("", 0);
+    defer root_node.end();
+
+    var arena_allocator = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    const arena = &arena_allocator.allocator;
+
+    const args = try std.process.argsAlloc(arena);
+    const path_to_walk = args[1];
+    const dir = try std.fs.cwd().openDir(path_to_walk, .{ .iterate = true });
+
+    var walker = try dir.walk(arena);
+    defer walker.deinit();
+
+    var buffer: [500]u8 = undefined;
+    const expected_header = buffer[0..try std.io.getStdIn().readAll(&buffer)];
+
+    while (try walker.next()) |entry| {
+        if (!std.mem.endsWith(u8, entry.basename, ".zig"))
+            continue;
+
+        var node = root_node.start(entry.basename, 0);
+        node.activate();
+        defer node.end();
+
+        const source = try dir.readFileAlloc(arena, entry.path, 20 * 1024 * 1024);
+        if (!std.mem.startsWith(u8, source, expected_header)) {
+            std.debug.print("no match: {s}\n", .{entry.path});
+            continue;
+        }
+
+        const truncated_source = source[expected_header.len..];
+
+        const new_source = try arena.alloc(u8, truncated_source.len + new_header.len);
+        std.mem.copy(u8, new_source, new_header);
+        std.mem.copy(u8, new_source[new_header.len..], truncated_source);
+
+        try dir.writeFile(entry.path, new_source);
+    }
+}