[Glitch] Use the new JSX transform everywhere

Port 8f66126b10 to glitch-soc

app/javascript/flavours/glitch/components/regeneration_indicator.jsx

@@ -1,4 +1,3 @@
-import React from 'react';
 import { FormattedMessage } from 'react-intl';
 import illustration from 'flavours/glitch/images/elephant_ui_working.svg';