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/ipv6_route.h b/libc/kernel/common/linux/ipv6_route.h
index b6749dc..3791e87 100644
--- a/libc/kernel/common/linux/ipv6_route.h
+++ b/libc/kernel/common/linux/ipv6_route.h
@@ -7,54 +7,49 @@
  ***   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_IPV6_ROUTE_H
 #define _LINUX_IPV6_ROUTE_H
+
 #include <linux/types.h>
+
 #define RTF_DEFAULT 0x00010000  
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define RTF_ALLONLINK 0x00020000  
 #define RTF_ADDRCONF 0x00040000  
 #define RTF_PREFIX_RT 0x00080000  
 #define RTF_ANYCAST 0x00100000  
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #define RTF_NONEXTHOP 0x00200000  
 #define RTF_EXPIRES 0x00400000
+
 #define RTF_ROUTEINFO 0x00800000  
+
 #define RTF_CACHE 0x01000000  
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define RTF_FLOW 0x02000000  
 #define RTF_POLICY 0x04000000  
+
 #define RTF_PREF(pref) ((pref) << 27)
 #define RTF_PREF_MASK 0x18000000
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #define RTF_LOCAL 0x80000000
+
 struct in6_rtmsg {
  struct in6_addr rtmsg_dst;
  struct in6_addr rtmsg_src;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct in6_addr rtmsg_gateway;
  __u32 rtmsg_type;
  __u16 rtmsg_dst_len;
  __u16 rtmsg_src_len;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u32 rtmsg_metric;
  unsigned long rtmsg_info;
  __u32 rtmsg_flags;
  int rtmsg_ifindex;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
+
 #define RTMSG_NEWDEVICE 0x11
 #define RTMSG_DELDEVICE 0x12
 #define RTMSG_NEWROUTE 0x21
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define RTMSG_DELROUTE 0x22
+
 #endif