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/workqueue.h b/libc/kernel/common/linux/workqueue.h
index 41baea3..12fab2c 100644
--- a/libc/kernel/common/linux/workqueue.h
+++ b/libc/kernel/common/linux/workqueue.h
@@ -7,42 +7,39 @@
  ***   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_WORKQUEUE_H
 #define _LINUX_WORKQUEUE_H
+
 #include <linux/timer.h>
 #include <linux/linkage.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/bitops.h>
+
 struct workqueue_struct;
+
 struct work_struct {
  unsigned long pending;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct list_head entry;
  void (*func)(void *);
  void *data;
  void *wq_data;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct timer_list timer;
 };
+
 struct execute_work {
  struct work_struct work;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
+
 #define __WORK_INITIALIZER(n, f, d) {   .entry = { &(n).entry, &(n).entry },   .func = (f),   .data = (d),   .timer = TIMER_INITIALIZER(NULL, 0, 0),   }
+
 #define DECLARE_WORK(n, f, d)   struct work_struct n = __WORK_INITIALIZER(n, f, d)
+
 #define PREPARE_WORK(_work, _func, _data)   do {   (_work)->func = _func;   (_work)->data = _data;   } while (0)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #define INIT_WORK(_work, _func, _data)   do {   INIT_LIST_HEAD(&(_work)->entry);   (_work)->pending = 0;   PREPARE_WORK((_work), (_func), (_data));   init_timer(&(_work)->timer);   } while (0)
+
 #define create_workqueue(name) __create_workqueue((name), 0)
 #define create_singlethread_workqueue(name) __create_workqueue((name), 1)
+
 #endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */