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/ia32_unistd.h b/libc/kernel/arch-x86/asm/ia32_unistd.h
index 2cb53d0..848d228 100644
--- a/libc/kernel/arch-x86/asm/ia32_unistd.h
+++ b/libc/kernel/arch-x86/asm/ia32_unistd.h
@@ -7,23 +7,16 @@
  ***   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_64_IA32_UNISTD_H_
 #define _ASM_X86_64_IA32_UNISTD_H_
+
 #define __NR_ia32_restart_syscall 0
 #define __NR_ia32_exit 1
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __NR_ia32_read 3
 #define __NR_ia32_write 4
 #define __NR_ia32_sigreturn 119
 #define __NR_ia32_rt_sigreturn 173
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #endif