timer:Remove clockevents_unregister_notifier

Hi everyone,

I find a function(clockevents_unregister_notifier) which is not
called by anything in tree.

diff -urN linux-2.6.23-rc2.orig/kernel/time/clockevents.c linux-2.6.23-rc2/kernel/time/clockevents.c
@@ -113,16 +113,6 @@

	return ret;
}

-/**
- * clockevents_unregister_notifier - unregister a clock events change listener
- */
-void clockevents_unregister_notifier(struct notifier_block *nb) -{
- spin_lock(&clockevents_lock);
- raw_notifier_chain_unregister(&clockevents_chain, nb);
- spin_unlock(&clockevents_lock);
-}
-
/*
* Notify about a clock event change. Called with clockevents_lock
* held.

diff -urN linux-2.6.23-rc2.orig/include/linux/clockchips.h linux-2.6.23-rc2/include/linux/clockchips.h
@@ -123,7 +123,6 @@

extern void clockevents_set_mode(struct clock_event_device *dev,

				 enum clock_event_mode mode);
extern int clockevents_register_notifier(struct notifier_block *nb);
-extern void clockevents_unregister_notifier(struct notifier_block *nb);
extern int clockevents_program_event(struct clock_event_device *dev,
				     ktime_t expires, ktime_t now);