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/asm-generic/tlb.h b/libc/kernel/common/asm-generic/tlb.h
index 6669388..dc1e79f 100644
--- a/libc/kernel/common/asm-generic/tlb.h
+++ b/libc/kernel/common/asm-generic/tlb.h
@@ -7,39 +7,31 @@
  ***   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 _ASM_GENERIC__TLB_H
 #define _ASM_GENERIC__TLB_H
+
 #include <linux/swap.h>
 #include <asm/pgalloc.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <asm/tlbflush.h>
+
 #define FREE_PTE_NR 1
 #define tlb_fast_mode(tlb) 1
+
 struct mmu_gather {
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct mm_struct *mm;
  unsigned int nr;
  unsigned int need_flush;
  unsigned int fullmm;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct page * pages[FREE_PTE_NR];
 };
+
 #define tlb_remove_tlb_entry(tlb, ptep, address)   do {   tlb->need_flush = 1;   __tlb_remove_tlb_entry(tlb, ptep, address);   } while (0)
 #define pte_free_tlb(tlb, ptep)   do {   tlb->need_flush = 1;   __pte_free_tlb(tlb, ptep);   } while (0)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifndef __ARCH_HAS_4LEVEL_HACK
 #define pud_free_tlb(tlb, pudp)   do {   tlb->need_flush = 1;   __pud_free_tlb(tlb, pudp);   } while (0)
 #endif
 #define pmd_free_tlb(tlb, pmdp)   do {   tlb->need_flush = 1;   __pmd_free_tlb(tlb, pmdp);   } while (0)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define tlb_migrate_finish(mm) do {} while (0)
 #endif