remove old test

test/mimetic_filament_test.dart

@@ -1,10 +0,0 @@
-import 'package:flutter/services.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-void main() {
-  const MethodChannel channel = MethodChannel('polyvox_filament');
-
-  TestWidgetsFlutterBinding.ensureInitialized();
-
-  test('getPlatformVersion', () async {});
-}