All commands must declare Unstructured or Internal

Callers must take a dependency on one or the other set of conversions
and default client behavior. Future changes may add a Versioned() type,
but this is an accurate reflection of current code state.

pkg/kubectl/cmd/rollout/rollout_undo.go

@@ -113,6 +113,7 @@ func (o *UndoOptions) CompleteUndo(f cmdutil.Factory, cmd *cobra.Command, out io
 	}
 
 	r := f.NewBuilder().
+		Internal().
 		NamespaceParam(cmdNamespace).DefaultNamespace().
 		FilenameParam(enforceNamespace, &o.FilenameOptions).
 		ResourceTypeOrNameArgs(true, args...).