Revert "build: switch example e2e tests to bazel (#28402)" (#28438)

This reverts commit ef78e33560.

PR Close #28438

packages/examples/core/start-server.js

@@ -1,17 +0,0 @@
-/**
- * @license
- * Copyright Google Inc. All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.io/license
- */
-
-const protractorUtils = require('@angular/bazel/protractor-utils');
-const protractor = require('protractor');
-
-module.exports = async function(config) {
-  const {port} = await protractorUtils.runServer(config.workspace, config.server, '-port', []);
-  const serverUrl = `http://localhost:${port}`;
-
-  protractor.browser.baseUrl = serverUrl;
-};