x86/mce: Clean up include files

Not really needed.
Tested-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Yazen Ghannam <yazen.ghannam@amd.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/20170613162835.30750-6-bp@alien8.deSigned-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/kernel/cpu/mcheck/mce-inject.c

@@ -25,20 +25,10 @@
 
 #include <linux/cpu.h>
 #include <linux/debugfs.h>
-#include <linux/device.h>
-#include <linux/fs.h>
-#include <linux/gfp.h>
-#include <linux/kdebug.h>
 #include <linux/kernel.h>
-#include <linux/kobject.h>
 #include <linux/module.h>
 #include <linux/notifier.h>
 #include <linux/pci.h>
-#include <linux/preempt.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/string.h>
-#include <linux/timer.h>
 #include <linux/uaccess.h>
 
 #include <asm/amd_nb.h>