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

runtime/observatory/tests/service/classes_test.dart

-// 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
-
-import 'package:observatory/service_io.dart';
-import 'package:unittest/unittest.dart';
-import 'test_helper.dart';
-
-var tests = [
-
-(Isolate isolate) =>
-  isolate.getClassHierarchy().then((Class o) {
-    expect(o.name, equals('Object'));
-}),
-
-(Isolate isolate) =>
-  isolate.getObject('classes/62').then((Class c) {
-    expect(c.name, equals('_ImmutableList'));
-    expect(c.vmCid, equals(62));
-}),
-
-
-];
-
-main(args) => runIsolateTests(args, tests);