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

runtime/observatory/tests/service/coverage_test.dart

Index: runtime/observatory/tests/service/coverage_test.dart
diff --git a/runtime/observatory/tests/service/coverage_test.dart b/runtime/observatory/tests/service/coverage_test.dart
index db9db76b5d1a7d19dededab90ef6a3730557603a..ee70bd0b3db4e5338c9aa9ff58633e9be67459b9 100644
--- a/runtime/observatory/tests/service/coverage_test.dart
+++ b/runtime/observatory/tests/service/coverage_test.dart
@@ -1,7 +1,7 @@
 // Copyright (c) 2015, 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 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';