Move pkg/api.FinanlizerOrphan into metav1

pkg/api/types.go

@@ -2798,10 +2798,10 @@ type NamespaceSpec struct {
 // FinalizerName is the name identifying a finalizer during namespace lifecycle.
 type FinalizerName string
 
-// These are internal finalizer values to Kubernetes, must be qualified name unless defined here
+// These are internal finalizer values to Kubernetes, must be qualified name unless defined here or
+// in metav1.
 const (
 	FinalizerKubernetes FinalizerName = "kubernetes"
-	FinalizerOrphan     string        = "orphan"
 )
 
 // NamespaceStatus is information about the current status of a Namespace.