[Glitch] Use JSX syntax for Fragments

Port 5a16bd7bf4 to glitch-soc

app/javascript/flavours/glitch/features/notifications/components/follow_request.jsx

@@ -1,4 +1,3 @@
-import { Fragment } from 'react';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import PropTypes from 'prop-types';
 import { Avatar } from 'flavours/glitch/components/avatar';
@@ -74,10 +73,10 @@ class FollowRequest extends ImmutablePureComponent {
 
     if (hidden) {
       return (
-        <Fragment>
+        <>
           {account.get('display_name')}
           {account.get('username')}
-        </Fragment>
+        </>
       );
     }