clockevents: remove sysdev.h

This isn't needed in the clockevents.c file, and the header file is
going away soon, so just remove the #include

Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

kernel/time/clockevents.c

@@ -17,7 +17,6 @@
 #include <linux/module.h>
 #include <linux/notifier.h>
 #include <linux/smp.h>
-#include <linux/sysdev.h>
 
 #include "tick-internal.h"