Clean up some pub and scheduled_test integration with the new isolate API.

pkg/scheduled_test/test/scheduled_test/simple_test.dart

Index: pkg/scheduled_test/test/scheduled_test/simple_test.dart
diff --git a/pkg/scheduled_test/test/scheduled_test/simple_test.dart b/pkg/scheduled_test/test/scheduled_test/simple_test.dart
index 3c6a9ddeb4785b1f1a2e61164a2b4d4de1cf5738..00ab2163d4038f6e7c53b932d647bf3f1789c5c3 100644
--- a/pkg/scheduled_test/test/scheduled_test/simple_test.dart
+++ b/pkg/scheduled_test/test/scheduled_test/simple_test.dart
@@ -9,8 +9,8 @@ import 'package:scheduled_test/scheduled_test.dart';
 import '../metatest.dart';
 import '../utils.dart';
 
-void main(List<String> args, message) {
-  metaTestInit(message);
+void main(_, message) {
+  initMetatest(message);
 
   setUpTimeout();