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/timer.h b/libc/kernel/common/linux/timer.h
index a113997..071a759 100644
--- a/libc/kernel/common/linux/timer.h
+++ b/libc/kernel/common/linux/timer.h
@@ -7,37 +7,35 @@
  ***   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 _LINUX_TIMER_H
 #define _LINUX_TIMER_H
+
 #include <linux/list.h>
 #include <linux/spinlock.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/stddef.h>
+
 struct tvec_t_base_s;
+
 struct timer_list {
  struct list_head entry;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned long expires;
+
  void (*function)(unsigned long);
  unsigned long data;
+
  struct tvec_t_base_s *base;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
+
 #define TIMER_INITIALIZER(_function, _expires, _data) {   .function = (_function),   .expires = (_expires),   .data = (_data),   .base = &boot_tvec_bases,   }
+
 #define DEFINE_TIMER(_name, _function, _expires, _data)   struct timer_list _name =   TIMER_INITIALIZER(_function, _expires, _data)
+
 #define try_to_del_timer_sync(t) del_timer(t)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define del_timer_sync(t) del_timer(t)
 #define del_singleshot_timer_sync(t) del_timer_sync(t)
+
 struct hrtimer;
+
 #endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */