chore: remove the greetings demo

Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

halkyon_learn_flutter/lib/main.dart

@@ -1,12 +1,11 @@
 import 'package:flutter/material.dart';
 
 import 'client.dart';
-import 'screens/greetings_screen.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await initializeClient();
-  runApp(const MyApp());
+  runApp(const HalkyonLearnApp());
 }
 
 /// Builds a theme for the given [brightness].
@@ -19,43 +18,17 @@ ThemeData _buildTheme(Brightness brightness) {
   );
 }
 
-class MyApp extends StatelessWidget {
-  const MyApp({super.key});
+class HalkyonLearnApp extends StatelessWidget {
+  const HalkyonLearnApp({super.key});
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Serverpod Demo',
+      title: 'Halkyon Learn',
       theme: _buildTheme(Brightness.light),
       darkTheme: _buildTheme(Brightness.dark),
       themeMode: ThemeMode.system,
-      home: const MyHomePage(title: 'Serverpod Example'),
-    );
-  }
-}
-
-class MyHomePage extends StatelessWidget {
-  const MyHomePage({super.key, required this.title});
-
-  final String title;
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text(title)),
-      body: const GreetingsScreen(),
-      // To test authentication in this example app, uncomment the line below
-      // and comment out the line above. This wraps the GreetingsScreen with a
-      // SignInScreen, which automatically shows a sign-in UI when the user is
-      // not authenticated and displays the GreetingsScreen once they sign in.
-      //
-      // body: SignInScreen(
-      //   child: GreetingsScreen(
-      //     onSignOut: () async {
-      //       await client.auth.signOutDevice();
-      //     },
-      //   ),
-      // ),
+      home: Scaffold(appBar: AppBar(title: Text('Halkyon Learn'))),
     );
   }
 }