Revert "Build Observatory with runtime"

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

Index: runtime/observatory/lib/src/elements/sliding_checkbox.dart
diff --git a/runtime/observatory/lib/src/elements/sliding_checkbox.dart b/runtime/observatory/lib/src/elements/sliding_checkbox.dart
deleted file mode 100644
index 760fd11d8f3b3a89bfe37a4a84de15739c80cbde..0000000000000000000000000000000000000000
--- a/runtime/observatory/lib/src/elements/sliding_checkbox.dart
+++ /dev/null
@@ -1,21 +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.
-
-library sliding_checkbox_element;
-
-import 'dart:html';
-import 'package:polymer/polymer.dart';
-
-@CustomTag('sliding-checkbox')
-class SlidingCheckboxElement extends PolymerElement {
-  SlidingCheckboxElement.created() : super.created();
-  @published bool checked;
-  @published String checkedText;
-  @published String uncheckedText;
-
-  void change(Event e, var details, Node target) {
-    CheckboxInputElement input = shadowRoot.querySelector('#slide-switch');
-    checked = input.checked;
-  }
-}