Merge: Revert "nvme: warn about shared namespaces without CONFIG_NVME_MULTIPATH"

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/1857

## Summary of Changes

Revert "nvme: warn about shared namespaces without CONFIG_NVME_MULTIPATH"

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2140810
Upstream Status: RHEL-only
Conflicts: Merge differences due to other commits

This commit added a warning message that functionality will be removed in
upstream kernel version 6.0.  Since we cannot remove this functionality
until at least the next major release, and also since our kernel version
numbering scheme is different than upstream, remove this message in RHEL.

This reverts commit 3650f2c.

Signed-off-by: Ewan D. Milne <emilne@redhat.com>

Approved-by: Chris Leech <cleech@redhat.com>
Approved-by: John B. Wyatt IV <jwyatt@redhat.com>

Signed-off-by: Herton R. Krzesinski <herton@redhat.com>

Author: Herton R. Krzesinski

drivers/block/loop.c

@@ -2063,7 +2063,6 @@ static void loop_remove(struct loop_device *lo)
 	/* Make this loop device unreachable from pathname. */
 	del_gendisk(lo->lo_disk);
 	blk_mq_free_tag_set(&lo->tag_set);
-
 	mutex_lock(&loop_ctl_mutex);
 	idr_remove(&loop_index_idr, lo->lo_number);
 	mutex_unlock(&loop_ctl_mutex);

drivers/nvme/host/core.c

@@ -4132,14 +4132,6 @@ static int nvme_init_ns_head(struct nvme_ns *ns, struct nvme_ns_info *info)
 					info->nsid);
 			goto out_put_ns_head;
 		}
-
-		if (!multipath && !list_empty(&head->list)) {
-			dev_warn(ctrl->device,
-				"Found shared namespace %d, but multipathing not supported.\n",
-				info->nsid);
-			dev_warn_once(ctrl->device,
-				"Support for shared namespaces without CONFIG_NVME_MULTIPATH is deprecated and will be removed in Linux 6.0\n.");
-		}
 	}
 
 	list_add_tail_rcu(&ns->siblings, &head->list);