Revert "Build Observatory with runtime"

runtime/observatory/test/classes_test.dart

Index: runtime/observatory/test/classes_test.dart
diff --git a/runtime/observatory/test/classes_test.dart b/runtime/observatory/test/classes_test.dart
deleted file mode 100644
index 55d834b1626ad0b971a3a6c7145b7210a24118b5..0000000000000000000000000000000000000000
--- a/runtime/observatory/test/classes_test.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-// 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.
-
-import 'package:observatory/service_io.dart';
-import 'package:unittest/unittest.dart';
-import 'test_helper.dart';
-
-var tests = [
-
-(Isolate isolate) =>
-  isolate.get('classes/62').then((Class c) {
-    expect(c.name, equals('_List'));
-    expect(c.vmCid, equals(62));
-}),
-
-];
-
-main(args) => runIsolateTests(args, tests);