misc: drop dependency on prop-types and polyfill

app.js

 /* application specific logic */
 
-// FIXME: remove once atlaskit work with React 16
-// It seems that @atlaskit/icon is importing PropTypes from React, but it
-// happens through some glyph coffee script template. It could be that more
-// things are broken there (not only the icon).
-import './react/features/base/react/prop-types-polyfill.js';
-
 import 'jquery';
 import 'jquery-contextmenu';
 import 'jQuery-Impromptu';

flow-typed/npm/prop-types_v15.x.x.js

-// flow-typed signature: d9a983bb1ac458a256c31c139047bdbb
-// flow-typed version: 927687984d/prop-types_v15.x.x/flow_>=v0.41.x
-
-type $npm$propTypes$ReactPropsCheckType = (
-  props: any,
-  propName: string,
-  componentName: string,
-  href?: string) => ?Error;
-
-declare module 'prop-types' {
-  declare var array: React$PropType$Primitive<Array<any>>;
-  declare var bool: React$PropType$Primitive<boolean>;
-  declare var func: React$PropType$Primitive<Function>;
-  declare var number: React$PropType$Primitive<number>;
-  declare var object: React$PropType$Primitive<Object>;
-  declare var string: React$PropType$Primitive<string>;
-  declare var symbol: React$PropType$Primitive<Symbol>;
-  declare var any: React$PropType$Primitive<any>;
-  declare var arrayOf: React$PropType$ArrayOf;
-  declare var element: React$PropType$Primitive<any>; /* TODO */
-  declare var instanceOf: React$PropType$InstanceOf;
-  declare var node: React$PropType$Primitive<any>; /* TODO */
-  declare var objectOf: React$PropType$ObjectOf;
-  declare var oneOf: React$PropType$OneOf;
-  declare var oneOfType: React$PropType$OneOfType;
-  declare var shape: React$PropType$Shape;
-
-  declare function checkPropTypes<V>(
-    propTypes: $Subtype<{[_: $Keys<V>]: $npm$propTypes$ReactPropsCheckType}>,
-    values: V,
-    location: string,
-    componentName: string,
-    getStack: ?(() => ?string)
-  ) : void;
-}

package.json

     "moment": "2.19.4",
     "moment-duration-format": "2.2.2",
     "postis": "2.2.0",
-    "prop-types": "15.6.0",
     "react": "16.6.3",
     "react-dom": "16.6.3",
     "react-emoji-render": "0.4.6",

react/features/base/dialog/components/web/StatelessDialog.js

 import Button, { ButtonGroup } from '@atlaskit/button';
 import Modal, { ModalFooter } from '@atlaskit/modal-dialog';
 import _ from 'lodash';
-import PropTypes from 'prop-types';
 import React, { Component } from 'react';
 
 import { translate } from '../../../i18n';

react/features/base/react/prop-types-polyfill.js

-import React from 'react';
-import PropTypes from 'prop-types';
-
-/* eslint-disable react/no-deprecated */
-
-if (typeof React.PropTypes === 'undefined') {
-    React.PropTypes = PropTypes;
-}
-
-/* eslint-enable react/no-deprecated */

react/features/settings/popup.js

 /* global JitsiMeetJS */
 
-// FIXME: remove once atlaskit work with React 16.
-import '../base/react/prop-types-polyfill.js';
-
 import DeviceSelectionPopup from './DeviceSelectionPopup';
 
 let deviceSelectionPopup;

webpack.config.js

                 './react/features/always-on-top/index.js',
 
             'dial_in_info_bundle': [
-
-                // atlaskit does not support React 16 prop-types
-                './react/features/base/react/prop-types-polyfill.js',
-
                 './react/features/invite/components/dial-in-info-page'
             ],