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/arch-x86/asm/pgalloc_32.h b/libc/kernel/arch-x86/asm/pgalloc_32.h
index 022ca61..bc0f884 100644
--- a/libc/kernel/arch-x86/asm/pgalloc_32.h
+++ b/libc/kernel/arch-x86/asm/pgalloc_32.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 _I386_PGALLOC_H
 #define _I386_PGALLOC_H
+
 #include <linux/threads.h>
 #include <linux/mm.h>  
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #define paravirt_alloc_pt(mm, pfn) do { } while (0)
 #define paravirt_alloc_pd(pfn) do { } while (0)
 #define paravirt_alloc_pd(pfn) do { } while (0)
 #define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) do { } while (0)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define paravirt_release_pt(pfn) do { } while (0)
 #define paravirt_release_pd(pfn) do { } while (0)
+
 #define pmd_populate_kernel(mm, pmd, pte)  do {   paravirt_alloc_pt(mm, __pa(pte) >> PAGE_SHIFT);   set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)));  } while (0)
+
 #define pmd_populate(mm, pmd, pte)  do {   paravirt_alloc_pt(mm, page_to_pfn(pte));   set_pmd(pmd, __pmd(_PAGE_TABLE +   ((unsigned long long)page_to_pfn(pte) <<   (unsigned long long) PAGE_SHIFT)));  } while (0)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #define __pte_free_tlb(tlb,pte)  do {   paravirt_release_pt(page_to_pfn(pte));   tlb_remove_page((tlb),(pte));  } while (0)
 #endif