remove comment

Author: severo

src/app.js

@@ -5,6 +5,5 @@ import ReactDOM from 'react-dom/client'
 const app = document.getElementById('app')
 if (!app) throw new Error('missing app element')
 
-// @ts-expect-error TODO: fix react createRoot type
-const root = ReactDOM.createRoot(document.getElementById('app'))
+const root = ReactDOM.createRoot(app)
 root.render(React.createElement(App))