clockevents: Remove clockevents_notify() prototype

This function no longer exists after commit a49b116d
(clockevents: Cleanup dead cpu explicitely, 2015-04-03). Remove
the prototype and the stub function.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: trivial@kernel.org
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: http://lkml.kernel.org/r/1436984500-5425-1-git-send-email-sboyd@codeaurora.orgSigned-off-by: Thomas Gleixner <tglx@linutronix.de>

include/linux/clockchips.h

@@ -234,13 +234,10 @@ static inline int tick_check_broadcast_expired(void) { return 0; }
 static inline void tick_setup_hrtimer_broadcast(void) { }
 # endif
 
-extern int clockevents_notify(unsigned long reason, void *arg);
-
 #else /* !CONFIG_GENERIC_CLOCKEVENTS: */
 
 static inline void clockevents_suspend(void) { }
 static inline void clockevents_resume(void) { }
-static inline int clockevents_notify(unsigned long reason, void *arg) { return 0; }
 static inline int tick_check_broadcast_expired(void) { return 0; }
 static inline void tick_setup_hrtimer_broadcast(void) { }