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/alternative_32.h b/libc/kernel/arch-x86/asm/alternative_32.h
index 5aa2088..ef13111 100644
--- a/libc/kernel/arch-x86/asm/alternative_32.h
+++ b/libc/kernel/arch-x86/asm/alternative_32.h
@@ -7,40 +7,32 @@
  ***   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 _I386_ALTERNATIVE_H
 #define _I386_ALTERNATIVE_H
+
 #include <asm/types.h>
 #include <linux/stddef.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/types.h>
+
 struct alt_instr {
  u8 *instr;
  u8 *replacement;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  u8 cpuid;
  u8 instrlen;
  u8 replacementlen;
  u8 pad;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
+
 struct module;
 #define alternative(oldinstr, newinstr, feature)   asm volatile ("661:\n\t" oldinstr "\n662:\n"   ".section .altinstructions,\"a\"\n"   "  .align 4\n"   "  .long 661b\n"     "  .long 663f\n"     "  .byte %c0\n"     "  .byte 662b-661b\n"     "  .byte 664f-663f\n"     ".previous\n"   ".section .altinstr_replacement,\"ax\"\n"   "663:\n\t" newinstr "\n664:\n"    ".previous" :: "i" (feature) : "memory")
 #define alternative_input(oldinstr, newinstr, feature, input...)   asm volatile ("661:\n\t" oldinstr "\n662:\n"   ".section .altinstructions,\"a\"\n"   "  .align 4\n"   "  .long 661b\n"     "  .long 663f\n"     "  .byte %c0\n"     "  .byte 662b-661b\n"     "  .byte 664f-663f\n"     ".previous\n"   ".section .altinstr_replacement,\"ax\"\n"   "663:\n\t" newinstr "\n664:\n"    ".previous" :: "i" (feature), ##input)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define alternative_io(oldinstr, newinstr, feature, output, input...)   asm volatile ("661:\n\t" oldinstr "\n662:\n"   ".section .altinstructions,\"a\"\n"   "  .align 4\n"   "  .long 661b\n"     "  .long 663f\n"     "  .byte %c[feat]\n"     "  .byte 662b-661b\n"     "  .byte 664f-663f\n"     ".previous\n"   ".section .altinstr_replacement,\"ax\"\n"   "663:\n\t" newinstr "\n664:\n"     ".previous" : output : [feat] "i" (feature), ##input)
 #define ASM_OUTPUT2(a, b) a, b
 #define LOCK_PREFIX ""
-struct paravirt_patch_site;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #define __parainstructions NULL
 #define __parainstructions_end NULL
+
 #endif