Kill service_test.cc tests in favor of dart tests for the service protocol.

runtime/observatory/tests/service/echo_test.dart

Index: runtime/observatory/tests/service/echo_test.dart
diff --git a/runtime/observatory/tests/service/echo_test.dart b/runtime/observatory/tests/service/echo_test.dart
index 1e68a2b7aa82988daa1edcfaea2614f6a28903c3..8d31f2fd65872fbca88d7ee2df5f8a64a8cf6122 100644
--- a/runtime/observatory/tests/service/echo_test.dart
+++ b/runtime/observatory/tests/service/echo_test.dart
@@ -1,7 +1,7 @@
 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
-// VMOptions=--compile-all --error_on_bad_type --error_on_bad_override --checked
+// VMOptions=--compile-all --error_on_bad_type --error_on_bad_override
 
 import 'dart:async';
 import 'package:observatory/service_io.dart';
@@ -39,4 +39,4 @@ var tests = [
 
 ];
 
-main(args) => runIsolateTests(args, tests);
+main(args) => runIsolateTests(args, tests);