refactor(Directive): drop moduleId

moduleId is only used by components to resolve urls.
Directives have no templates and do not need moduleId.
Closes #5873

modules/angular2/src/mock/directive_resolver_mock.ts

@@ -47,7 +47,6 @@ export class MockDirectiveResolver extends DirectiveResolver {
       host: dm.host,
       providers: providers,
       exportAs: dm.exportAs,
-      moduleId: dm.moduleId,
       queries: dm.queries
     });
   }