refactor: remove unused notification permission hook and related code

src/App.tsx

@@ -1,9 +1,7 @@
 import { AppDataProvider } from "./providers/app-data-provider";
 import Layout from "./pages/_layout";
-import { useNotificationPermission } from "./hooks/useNotificationPermission";
 
 function App() {
-  useNotificationPermission();
   return (
     <AppDataProvider>
       <Layout />