Remove unused imports

pages/index.tsx

@@ -1,5 +1,5 @@
+import { Notification } from '@mantine/core';
 import AppShelf from '../components/AppShelf/AppShelf';
-import { Center, Group } from '@mantine/core';
 import LoadConfigComponent from '../components/Config/LoadConfig';
 import SearchBar from '../components/SearchBar/SearchBar';