nvme-tcp: don't initialize ret variable

No point in initializing ret variable to 0 in nvme_tcp_start_io_queue()
since it gets overwritten by a call to nvme_tcp_start_queue().

Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/host/tcp.c

@@ -1674,7 +1674,7 @@ static void nvme_tcp_stop_io_queues(struct nvme_ctrl *ctrl)
 
 static int nvme_tcp_start_io_queues(struct nvme_ctrl *ctrl)
 {
-	int i, ret = 0;
+	int i, ret;
 
 	for (i = 1; i < ctrl->queue_count; i++) {
 		ret = nvme_tcp_start_queue(ctrl, i);