Revert "Update bionic kernel headers using update_all.py"

This reverts commit 94a85f663694e1869acb1c2e8a3c374a6fa3ab86

There is a smoke test failure for Prime but Crespo/Stingray are fine. Will revert the change for now until further investigation is made.
diff --git a/libc/kernel/arch-arm/asm/semaphore.h b/libc/kernel/arch-arm/asm/semaphore.h
index 6e01eff..7c5618a 100644
--- a/libc/kernel/arch-arm/asm/semaphore.h
+++ b/libc/kernel/arch-arm/asm/semaphore.h
@@ -7,34 +7,30 @@
  ***   structures, and macros generated from the original header, and thus,
  ***   contains no copyrightable information.
  ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
  ****************************************************************************
  ****************************************************************************/
 #ifndef __ASM_ARM_SEMAPHORE_H
 #define __ASM_ARM_SEMAPHORE_H
+
 #include <linux/linkage.h>
 #include <linux/spinlock.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/wait.h>
 #include <linux/rwsem.h>
+
 #include <asm/atomic.h>
 #include <asm/locks.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 struct semaphore {
  atomic_t count;
  int sleepers;
  wait_queue_head_t wait;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
+
 #define __SEMAPHORE_INIT(name, cnt)  {   .count = ATOMIC_INIT(cnt),   .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait),  }
+
 #define __DECLARE_SEMAPHORE_GENERIC(name,count)   struct semaphore name = __SEMAPHORE_INIT(name,count)
+
 #define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC(name,0)
+
 #endif