rtc/pxa: remove unused field

pxa_rtc.rtc_alarm is unused.
Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-pxa.c

@@ -87,7 +87,6 @@ struct pxa_rtc {
 	int			irq_Alrm;
 	struct rtc_device	*rtc;
 	spinlock_t		lock;		/* Protects this structure */
-	struct rtc_time		rtc_alarm;
 };
 
 static u32 ryxr_calc(struct rtc_time *tm)