Revert "Build Observatory with runtime"

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

-// 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 library_view_element;
-
-import 'dart:async';
-import 'observatory_element.dart';
-import 'package:observatory/service.dart';
-import 'package:polymer/polymer.dart';
-
-
-@CustomTag('library-view')
-class LibraryViewElement extends ObservatoryElement {
-  @published Library library;
-
-  LibraryViewElement.created() : super.created();
-
-  Future<ServiceObject> eval(String text) {
-    return library.isolate.get(
-        library.id + "/eval?expr=${Uri.encodeComponent(text)}");
-  }
-
-  void refresh(var done) {
-    library.reload().whenComplete(done);
-  }
-
-  void refreshCoverage(var done) {
-    library.refreshCoverage().whenComplete(done);
-  }
-}