nvme-core: remove redundant check from nvme_init_ns_head

nvme_find_ns_head already checks that the list of namescpaces
in an already existing namespace head is not empty

Signed-off-by: Irvin Cote <irvincoteg@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>

Author: i-cote

drivers/nvme/host/core.c

@@ -3563,7 +3563,7 @@ static int nvme_init_ns_head(struct nvme_ns *ns, struct nvme_ns_info *info)
 			goto out_put_ns_head;
 		}
 
-		if (!multipath && !list_empty(&head->list)) {
+		if (!multipath) {
 			dev_warn(ctrl->device,
 				"Found shared namespace %d, but multipathing not supported.\n",
 				info->nsid);