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/nfsd/stats.h b/libc/kernel/common/linux/nfsd/stats.h
index 46b0c02..647e65c 100644
--- a/libc/kernel/common/linux/nfsd/stats.h
+++ b/libc/kernel/common/linux/nfsd/stats.h
@@ -7,39 +7,32 @@
  ***   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_NFSD_STATS_H
 #define LINUX_NFSD_STATS_H
+
 #include <linux/nfs4.h>
+
 struct nfsd_stats {
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int rchits;
  unsigned int rcmisses;
  unsigned int rcnocache;
  unsigned int fh_stale;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int fh_lookup;
  unsigned int fh_anon;
  unsigned int fh_nocache_dir;
  unsigned int fh_nocache_nondir;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int io_read;
  unsigned int io_write;
  unsigned int th_cnt;
  unsigned int th_usage[10];
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int th_fullcnt;
  unsigned int ra_size;
  unsigned int ra_depth[11];
+
 };
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #define NFSD_USAGE_WRAP (HZ*1000000)
+
 #endif