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-x86/asm/shmbuf.h b/libc/kernel/arch-x86/asm/shmbuf.h
index 81cce3e..314ccb7 100644
--- a/libc/kernel/arch-x86/asm/shmbuf.h
+++ b/libc/kernel/arch-x86/asm/shmbuf.h
@@ -7,55 +7,43 @@
  ***   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_X86_SHMBUF_H
 #define _ASM_X86_SHMBUF_H
+
 struct shmid64_ds {
  struct ipc64_perm shm_perm;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  size_t shm_segsz;
  __kernel_time_t shm_atime;
 #ifdef __i386__
  unsigned long __unused1;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
  __kernel_time_t shm_dtime;
 #ifdef __i386__
  unsigned long __unused2;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
  __kernel_time_t shm_ctime;
 #ifdef __i386__
  unsigned long __unused3;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
  __kernel_pid_t shm_cpid;
  __kernel_pid_t shm_lpid;
  unsigned long shm_nattch;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long __unused4;
  unsigned long __unused5;
 };
+
 struct shminfo64 {
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long shmmax;
  unsigned long shmmin;
  unsigned long shmmni;
  unsigned long shmseg;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long shmall;
  unsigned long __unused1;
  unsigned long __unused2;
  unsigned long __unused3;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long __unused4;
 };
+
 #endif