Use the new JSX transform (#25064)

app/javascript/mastodon/features/favourited_statuses/index.jsx

@@ -1,6 +1,5 @@
 import { debounce } from 'lodash';
 import PropTypes from 'prop-types';
-import React from 'react';
 import { Helmet } from 'react-helmet';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import ImmutablePureComponent from 'react-immutable-pure-component';