drivers/misc/sgi-gru/grutlbpurge.c: removed duplicated #include

Removed duplicated include <linux/delay.h> in
drivers/misc/sgi-gru/grutlbpurge.c.
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Cc: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/misc/sgi-gru/grutlbpurge.c

@@ -34,7 +34,6 @@
 #include <linux/hugetlb.h>
 #include <linux/delay.h>
 #include <linux/timex.h>
-#include <linux/delay.h>
 #include <linux/srcu.h>
 #include <asm/processor.h>
 #include "gru.h"