fs/reiserfs/do_balan.c: remove set but not used variable

Fix the following gcc warning:

fs/reiserfs/do_balan.c: In function balance_leaf_insert_right:
fs/reiserfs/do_balan.c:629:6: warning: variable ret set but not used
[-Wunused-but-set-variable]

Link: http://lkml.kernel.org/r/20190827032932.46622-2-yanaijie@huawei.com
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Cc: zhengbin <zhengbin13@huawei.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/reiserfs/do_balan.c

@@ -626,7 +626,6 @@ static void balance_leaf_insert_right(struct tree_balance *tb,
 	struct buffer_head *tbS0 = PATH_PLAST_BUFFER(tb->tb_path);
 	int n = B_NR_ITEMS(tbS0);
 	struct buffer_info bi;
-	int ret;
 
 	/* new item or part of it doesn't fall into R[0] */
 	if (n - tb->rnum[0] >= tb->item_pos) {
@@ -690,7 +689,7 @@ static void balance_leaf_insert_right(struct tree_balance *tb,
 		/* whole new item falls into R[0] */
 
 		/* Shift rnum[0]-1 items to R[0] */
-		ret = leaf_shift_right(tb, tb->rnum[0] - 1, tb->rbytes);
+		leaf_shift_right(tb, tb->rnum[0] - 1, tb->rbytes);
 
 		/* Insert new item into R[0] */
 		buffer_info_init_right(tb, &bi);