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/delay.h b/libc/kernel/arch-x86/asm/delay.h
index 455455a..7cb5f74 100644
--- a/libc/kernel/arch-x86/asm/delay.h
+++ b/libc/kernel/arch-x86/asm/delay.h
@@ -7,18 +7,13 @@
  ***   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_DELAY_H
 #define _ASM_X86_DELAY_H
+
 #define udelay(n) (__builtin_constant_p(n) ?   ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) :   __udelay(n))
+
 #define ndelay(n) (__builtin_constant_p(n) ?   ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) :   __ndelay(n))
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #endif