elevator: fix unnecessary put of elevator in failure case

We already checked that e is NULL, so no point in calling
elevator_put() to free it.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: dc877dbd088f ("blk-mq-sched: add framework for MQ capable IO schedulers")
Signed-off-by: Jens Axboe <axboe@fb.com>

block/elevator.c

@@ -230,10 +230,6 @@ int elevator_init(struct request_queue *q, char *name)
 			printk(KERN_ERR
 				"Default I/O scheduler not found. " \
 				"Using noop/none.\n");
-			if (q->mq_ops) {
-				elevator_put(e);
-				return 0;
-			}
 			e = elevator_get("noop", false);
 		}
 	}