chore: Fix linting issues in main.dart

example/lib/main.dart

@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// ignore_for_file: unused_element, prefer_final_fields, unused_field, type_annotate_public_apis, unreachable_from_main
 import 'package:example/async_function.dart';
-// ignore_for_file: unused_element, prefer_final_fields, unused_field, type_annotate_public_apis
 import 'package:meta/meta.dart';
 import 'package:surf_lint_rules/surf_lint_rules.dart';