remove unused imports

Author: khanhnwin

firebase_ai_logic_showcase/lib/demos/chat/chat_demo.dart

@@ -24,7 +24,7 @@ import '../../shared/ui/app_frame.dart';
 import '../../shared/ui/app_spacing.dart';
 import './ui_components/ui_components.dart';
 import './firebaseai_chat_service.dart';
-import 'ui_components/model_picker.dart';
+
 import './models/models.dart';
 
 class ChatDemo extends ConsumerStatefulWidget {

firebase_ai_logic_showcase/lib/demos/chat_nano/models/gemini_model_nano.dart

@@ -1,5 +1,4 @@
 import 'package:firebase_ai/firebase_ai.dart';
-import '../../../shared/function_calling/tools.dart';
 
 var geminiModels = GeminiModelsNano();