Cleanup after merge

frontend/src/components/LegacyPlugin.tsx

@@ -0,0 +1,21 @@
+import { VFC } from 'react';
+
+// class LegacyPlugin extends React.Component {
+//     constructor(props: object) {
+//         super(props);
+//     }
+
+//     render() {
+//         return <iframe style={{ border: 'none', width: '100%', height: '100%' }} src={this.props.url}></iframe>
+//     }
+// }
+
+interface Props {
+  url: string;
+}
+
+const LegacyPlugin: VFC<Props> = () => {
+  return <div>LegacyPlugin Hello World</div>;
+};
+
+export default LegacyPlugin;