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/plist.h b/libc/kernel/common/linux/plist.h
index 01f63d7..5d65783 100644
--- a/libc/kernel/common/linux/plist.h
+++ b/libc/kernel/common/linux/plist.h
@@ -7,39 +7,38 @@
  ***   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_PLIST_H_
 #define _LINUX_PLIST_H_
+
 #include <linux/kernel.h>
 #include <linux/list.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/spinlock_types.h>
+
 struct plist_head {
  struct list_head prio_list;
  struct list_head node_list;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
+
 struct plist_node {
  int prio;
  struct plist_head plist;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
+
 #define PLIST_HEAD_LOCK_INIT(_lock)
+
 #define PLIST_HEAD_INIT(head, _lock)  {   .prio_list = LIST_HEAD_INIT((head).prio_list),   .node_list = LIST_HEAD_INIT((head).node_list),   PLIST_HEAD_LOCK_INIT(&(_lock))  }
+
 #define PLIST_NODE_INIT(node, __prio)  {   .prio = (__prio),   .plist = PLIST_HEAD_INIT((node).plist, NULL),  }
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #define plist_for_each(pos, head)   list_for_each_entry(pos, &(head)->node_list, plist.node_list)
+
 #define plist_for_each_safe(pos, n, head)   list_for_each_entry_safe(pos, n, &(head)->node_list, plist.node_list)
+
 #define plist_for_each_entry(pos, head, mem)   list_for_each_entry(pos, &(head)->node_list, mem.plist.node_list)
+
 #define plist_for_each_entry_safe(pos, n, head, m)   list_for_each_entry_safe(pos, n, &(head)->node_list, m.plist.node_list)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #define plist_first_entry(head, type, member)   container_of(plist_first(head), type, member)
 #endif