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-arm/asm/hardirq.h b/libc/kernel/arch-arm/asm/hardirq.h
index db06a9a..54207e3 100644
--- a/libc/kernel/arch-arm/asm/hardirq.h
+++ b/libc/kernel/arch-arm/asm/hardirq.h
@@ -7,37 +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 __ASM_HARDIRQ_H
 #define __ASM_HARDIRQ_H
+
 #include <linux/cache.h>
 #include <linux/threads.h>
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <asm/irq.h>
+
 typedef struct {
  unsigned int __softirq_pending;
  unsigned int local_timer_irqs;
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 } ____cacheline_aligned irq_cpustat_t;
+
 #include <linux/irq_cpustat.h>  
+
 #if NR_IRQS > 256
 #define HARDIRQ_BITS 9
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #else
 #define HARDIRQ_BITS 8
 #endif
+
 #if 1 << HARDIRQ_BITS < NR_IRQS
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #error HARDIRQ_BITS is too low!
 #endif
+
 #define __ARCH_IRQ_EXIT_IRQS_DISABLED 1
+
 #endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */