timers: Drop a function prototype

Drop prototype for non-existent next_timer_interrupt() function.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Cc: akpm <akpm@linux-foundation.org>
LKML-Reference: <4A9ADEC0.70306@oracle.com>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

include/linux/timer.h

@@ -173,11 +173,6 @@ extern int mod_timer_pinned(struct timer_list *timer, unsigned long expires);
  */
 #define NEXT_TIMER_MAX_DELTA	((1UL << 30) - 1)
 
-/*
- * Return when the next timer-wheel timeout occurs (in absolute jiffies),
- * locks the timer base:
- */
-extern unsigned long next_timer_interrupt(void);
 /*
  * Return when the next timer-wheel timeout occurs (in absolute jiffies),
  * locks the timer base and does the comparison against the given