Remove static clues from spawn_uri_child_isolate.dart

tests/isolate/spawn_uri_child_isolate.dart

Index: tests/isolate/spawn_uri_child_isolate.dart
diff --git a/tests/isolate/spawn_uri_child_isolate.dart b/tests/isolate/spawn_uri_child_isolate.dart
index 57f1dde7a64d86396ead690dc340db773f559595..81f40f9bb9d12decfa4546ed4db1a99171469013 100644
--- a/tests/isolate/spawn_uri_child_isolate.dart
+++ b/tests/isolate/spawn_uri_child_isolate.dart
@@ -4,9 +4,8 @@
 
 // Child isolate code to be spawned from a URI to this file.
 library SpawnUriChildIsolate;
-import 'dart:isolate';
 
-void main(List<String> args, SendPort replyTo) {
+void main(List<String> args, replyTo) {
   var data = args[0];
   replyTo.send('re: $data');
 }