I noticed it’s getting included in production builds again (but it shouldn’t be).
Filing this to track it because we specifically fixed it recently, and we’re regressing on this.

Likely related to #7168.

/**
 * Copyright 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.
 *
 * @providesModule ReactWithAddonsUMDEntry
 */
'use strict';
var ReactWithAddons = require('ReactWithAddons');
var ReactWithAddonsUMDEntry = Object.assign({
  __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED: {
    ReactCurrentOwner: require('ReactCurrentOwner'),
    ReactComponentTreeHook: require('ReactComponentTreeHook'),
  },
}, ReactWithAddons);
module.exports = ReactWithAddonsUMDEntry;