Speculatively revert "Make the object store visible in Observatory."

runtime/observatory/lib/src/elements/objectstore_ref.dart

Index: runtime/observatory/lib/src/elements/objectstore_ref.dart
diff --git a/runtime/observatory/lib/src/elements/objectstore_ref.dart b/runtime/observatory/lib/src/elements/objectstore_ref.dart
deleted file mode 100644
index 65dd6eb64fbefc7fa9ec7153d65a3a7c5e6f78b8..0000000000000000000000000000000000000000
--- a/runtime/observatory/lib/src/elements/objectstore_ref.dart
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright (c) 2013, 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.
-
-library objectstore_ref_element;
-
-import 'package:observatory/service.dart';
-import 'package:polymer/polymer.dart';
-import 'service_ref.dart';
-import 'dart:async';
-
-@CustomTag('objectstore-ref')
-class ObjectStoreRefElement extends ServiceRefElement {
-
-  ObjectStoreRefElement.created() : super.created();
-}