chor: remove firebase_options.dart

Author: russellwheatley

packages/firebase_performance/firebase_performance/example/lib/firebase_options.dart

@@ -10,13 +10,9 @@ import 'package:flutter/material.dart';
 import 'package:http/http.dart';
 import 'package:pedantic/pedantic.dart';
 
-import 'firebase_options.dart';
-
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
-  await Firebase.initializeApp(
-    options: DefaultFirebaseOptions.currentPlatform,
-  );
+  await Firebase.initializeApp();
   runApp(MyApp());
 }