ANDROID: Fix slab memory leakage issue

lowmem_scan call get_task_struct twice, which causes memory leakage.

Remove the duplicated get_task_struct which was invoked by LTS.

Change-Id: I2a3374f63cd2ec034f9e794917587a04d3975484
Signed-off-by: jianzhou <jianzhou@codeaurora.org>
diff --git a/drivers/staging/android/lowmemorykiller.c b/drivers/staging/android/lowmemorykiller.c
index 853601d..2bfefef 100755
--- a/drivers/staging/android/lowmemorykiller.c
+++ b/drivers/staging/android/lowmemorykiller.c
@@ -817,8 +817,6 @@
 		trace_almk_shrink(selected_tasksize, ret,
 				  other_free, other_file,
 				  selected_oom_score_adj);
-
-		get_task_struct(selected);
 	} else {
 		trace_almk_shrink(1, ret, other_free, other_file, 0);
 		rcu_read_unlock();