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

pkg/scheduled_test/test/scheduled_test/set_up_test.dart

Index: pkg/scheduled_test/test/scheduled_test/set_up_test.dart
diff --git a/pkg/scheduled_test/test/scheduled_test/set_up_test.dart b/pkg/scheduled_test/test/scheduled_test/set_up_test.dart
index fa3d47e8edf7031b862117e8ffa88284de8a3f25..1fbf80fa6c9e9c012d0043f319d35c2c9837c10f 100644
--- a/pkg/scheduled_test/test/scheduled_test/set_up_test.dart
+++ b/pkg/scheduled_test/test/scheduled_test/set_up_test.dart
@@ -7,8 +7,8 @@ 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();