nvme-tcp: remove dead code

We should never touch the opal device from the transport driver.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/host/tcp.c

@@ -1620,7 +1620,6 @@ static void nvme_tcp_destroy_admin_queue(struct nvme_ctrl *ctrl, bool remove)
 {
 	nvme_tcp_stop_queue(ctrl, 0);
 	if (remove) {
-		free_opal_dev(ctrl->opal_dev);
 		blk_cleanup_queue(ctrl->admin_q);
 		blk_mq_free_tag_set(ctrl->admin_tagset);
 	}