[Glitch] Use the new JSX transform everywhere

Port 8f66126b10 to glitch-soc

app/javascript/flavours/glitch/components/edited_timestamp/index.jsx

@@ -1,4 +1,4 @@
-import React from 'react';
+import { PureComponent } from 'react';
 import PropTypes from 'prop-types';
 import { FormattedMessage, injectIntl } from 'react-intl';
 import { Icon } from 'flavours/glitch/components/icon';
@@ -16,7 +16,7 @@ const mapDispatchToProps = (dispatch, { statusId }) => ({
 
 });
 
-class EditedTimestamp extends React.PureComponent {
+class EditedTimestamp extends PureComponent {
 
   static propTypes = {
     statusId: PropTypes.string.isRequired,