Remove index.tsx

frontend/src/index.tsx

@@ -1,14 +0,0 @@
-import React from 'react';
-import ReactDOM from 'react-dom/client';
-import './index.css';
-import App from './App';
-
-const root = ReactDOM.createRoot(
-  document.getElementById('root') as HTMLElement
-);
-
-root.render(
-  <React.StrictMode>
-    <App />
-  </React.StrictMode>
-);