Remove setupBabel.

packages/setupBabel.js

@@ -1,50 +0,0 @@
-/**
- * Copyright (c) 2013-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-'use strict';
-
-const babelRegisterOnly = require('./metro-bundler/babelRegisterOnly');
-const escapeRegExp = require('lodash/escapeRegExp');
-const path = require('path');
-
-const BABEL_ENABLED_PATHS = [
-  'metro-bundler/src',
-  'metro-bundler/transformer.js',
-  'metro-bundler/react-packager.js',
-];
-
-/**
- * We use absolute paths for matching only the top-level folders reliably. For
- * example, we would not want to match some deeply nested forder that happens to
- * have the same name as one of `BABEL_ENABLED_PATHS`.
- */
-function buildRegExps(basePath, dirPaths) {
-  return dirPaths.map(folderPath =>
-    // Babel `only` option works with forward slashes in the RegExp so replace
-    // backslashes for Windows.
-    new RegExp(`^${escapeRegExp(path.resolve(basePath, folderPath).replace(/\\/g, '/'))}`)
-  );
-}
-
-function getOnlyList() {
-  return buildRegExps(__dirname, BABEL_ENABLED_PATHS);
-}
-
-/**
- * Centralized place to register all the directories that need a Babel
- * transformation before being fed to Node.js. Notably, this is necessary to
- * support Flow type annotations.
- */
-function setupBabel() {
-  babelRegisterOnly(getOnlyList());
-}
-
-setupBabel.buildRegExps = buildRegExps;
-setupBabel.getOnlyList = getOnlyList;
-module.exports = setupBabel;