ceph: remove DaemonType type

This type was a string already and was just making us doing string()
calls all the time to it's not worth it.

Signed-off-by: Sébastien Han <seb@redhat.com>

pkg/operator/ceph/cluster/mgr/mgr.go

@@ -182,8 +182,7 @@ func (c *Cluster) Start() error {
 			}
 			logger.Infof("deployment for mgr %s already exists. updating if needed", resourceName)
 
-			daemon := string(config.MgrType)
-			if err := updateDeploymentAndWait(c.context, d, c.Namespace, daemon, mgrConfig.DaemonID, c.skipUpgradeChecks, false); err != nil {
+			if err := updateDeploymentAndWait(c.context, d, c.Namespace, config.MgrType, mgrConfig.DaemonID, c.skipUpgradeChecks, false); err != nil {
 				logger.Errorf("failed to update mgr deployment %q. %+v", resourceName, err)
 			}
 		}