Delete site/try

tests/try/web/mock_try.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.
-
-import 'dart:html' show
-    DivElement,
-    MutationObserver,
-    document;
-
-import 'package:try/src/interaction_manager.dart' show
-    InteractionManager;
-
-import 'package:try/src/ui.dart' show
-    hackDiv,
-    mainEditorPane,
-    observer;
-
-import 'package:try/src/user_option.dart' show
-    UserOption;
-
-InteractionManager mockTryDartInteraction() {
-  UserOption.storage = {};
-
-  InteractionManager interaction = new InteractionManager();
-
-  hackDiv = new DivElement();
-  mainEditorPane = new DivElement()
-      ..style.whiteSpace = 'pre'
-      ..contentEditable = 'true';
-
-  observer = new MutationObserver(interaction.onMutation);
-  observer.observe(
-      mainEditorPane, childList: true, characterData: true, subtree: true);
-
-  document.body.nodes.addAll([mainEditorPane, hackDiv]);
-
-  return interaction;
-}
-
-void clearEditorPaneWithoutNotifications() {
-  mainEditorPane.nodes.clear();
-  observer.takeRecords();
-}