staging: lowmemorykiller: remove bogus NULL check

The NULL checking here doesn't make sense, so it causes a static checker
warning.  It turns out that p->mm can't be NULL so the inconsistency is
harmless and we should just remove the check.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/lowmemorykiller.c

@@ -131,7 +131,7 @@ static unsigned long lowmem_scan(struct shrinker *s, struct shrink_control *sc)
 		if (!p)
 			continue;
 
-		if (task_lmk_waiting(p) && p->mm &&
+		if (task_lmk_waiting(p) &&
 		    time_before_eq(jiffies, lowmem_deathpending_timeout)) {
 			task_unlock(p);
 			rcu_read_unlock();