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/udp.h b/libc/kernel/common/linux/udp.h
index 53a78c4..e4bf864 100644
--- a/libc/kernel/common/linux/udp.h
+++ b/libc/kernel/common/linux/udp.h
@@ -7,29 +7,24 @@
  ***   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_UDP_H
 #define _LINUX_UDP_H
+
 #include <linux/types.h>
+
 struct udphdr {
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u16 source;
  __u16 dest;
  __u16 len;
  __u16 check;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
+
 #define UDP_CORK 1  
 #define UDP_ENCAP 100  
+
 #define UDP_ENCAP_ESPINUDP_NON_IKE 1  
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define UDP_ENCAP_ESPINUDP 2  
+
 #endif