Delete legacy mobile UI - Fixes #2557

.env.example

@@ -19,7 +19,6 @@ MAILGUN_KEY=<your-mailgun-api-key>
 ML5_LIBRARY_USERNAME=ml5
 [email protected]
 ML5_LIBRARY_PASS=helloml5
-MOBILE_ENABLED=true
 MONGO_URL=mongodb://localhost:27017/p5js-web-editor
 PORT=8000
 PREVIEW_PORT=8002

client/components/mobile/IconButton.jsx → client/common/IconButton.jsx

@@ -1,8 +1,8 @@
 import React from 'react';
 import PropTypes from 'prop-types';
 import styled from 'styled-components';
-import Button from '../../common/Button';
-import { remSize } from '../../theme';
+import Button from './Button';
+import { remSize } from '../theme';
 
 const ButtonWrapper = styled(Button)`
   width: ${remSize(48)};

client/components/Dropdown.jsx

@@ -2,7 +2,7 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import styled from 'styled-components';
 import { remSize, prop } from '../theme';
-import IconButton from './mobile/IconButton';
+import IconButton from '../common/IconButton';
 
 const DropdownWrapper = styled.ul`
   background-color: ${prop('Modal.background')};