Remove unecessary js from public folder

frontend/public/index.html

@@ -41,10 +41,5 @@
       To create a production bundle, use `npm run build` or `yarn build`.
 		-->
     <script src="https://cdnjs.cloudflare.com/ajax/libs/holder/2.9.7/holder.js"></script>
-    <script>
-      function holder() {
-        Holder.run();
-      }
-    </script>
   </body>
 </html>

frontend/src/components/pages/ModulePage/index.tsx

@@ -8,7 +8,7 @@ import Card from "react-bootstrap/Card";
 const ModulePage: React.FC = () => {
   // only needed for using holder images, delete when done
   // @ts-ignore
-  useEffect(window.holder);
+  useEffect(() => {window.Holder.run()});
 
   return (
     <Container className="p-4">