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/common/linux/fadvise.h b/libc/kernel/common/linux/fadvise.h
index efa9e55..25a0a4c 100644
--- a/libc/kernel/common/linux/fadvise.h
+++ b/libc/kernel/common/linux/fadvise.h
@@ -7,29 +7,22 @@
  ***   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 FADVISE_H_INCLUDED
 #define FADVISE_H_INCLUDED
+
 #define POSIX_FADV_NORMAL 0  
 #define POSIX_FADV_RANDOM 1  
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define POSIX_FADV_SEQUENTIAL 2  
 #define POSIX_FADV_WILLNEED 3  
+
 #ifdef __s390x__
 #define POSIX_FADV_DONTNEED 6  
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define POSIX_FADV_NOREUSE 7  
 #else
 #define POSIX_FADV_DONTNEED 4  
 #define POSIX_FADV_NOREUSE 5  
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
+
 #endif