Remove deprecated packages from the repo

pkg/mutation_observer/test/mutation_observer_test.dart

Index: pkg/mutation_observer/test/mutation_observer_test.dart
diff --git a/pkg/mutation_observer/test/mutation_observer_test.dart b/pkg/mutation_observer/test/mutation_observer_test.dart
deleted file mode 100644
index 6f257e4fd35efb1241642fb96f13f5235edd1e28..0000000000000000000000000000000000000000
--- a/pkg/mutation_observer/test/mutation_observer_test.dart
+++ /dev/null
@@ -1,105 +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 mutation_observer_test;
-
-import 'dart:html';
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_config.dart';
-
-main() {
-  useHtmlConfiguration();
-
-  // Load the MutationObserver polyfill.
-  HttpRequest.getString('/root_dart/pkg/mutation_observer/lib/'
-      'mutation_observer.min.js').then((code) {
-
-    // Force MutationObserver polyfill to be used so we can test it, even in
-    // browsers with native support.
-    document.head.children.add(new ScriptElement()
-        ..text = 'window.MutationObserver = void 0;'
-                 'window.WebKitMutationObserver = void 0;'
-                 '$code');
-
-    testMutationObserver();
-  });
-}
-
-/**
- * Test suite for Mutation Observers. This is just a small set of sanity
- * checks, not a complete test suite.
- */
-testMutationObserver() {
-  group('supported', () {
-    test('supported', () {
-      expect(MutationObserver.supported, true, reason: 'polyfill loaded.');
-    });
-  });
-
-  group('childList', () {
-    mutationCallback(count, expectation) {
-      var done = false;
-      var nodes = [];
-
-      callback(mutations, observer) {
-        for (MutationRecord mutation in mutations) {
-          for (Node node in mutation.addedNodes) {
-            nodes.add(node);
-          }
-        }
-        if (nodes.length >= count) {
-          done = true;
-          expect(nodes.length, count);
-          expect(nodes, expectation);
-        }
-      }
-
-      return expectAsyncUntil(callback, () => done);
-    }
-
-    test('empty options is syntax error', () {
-      var mutationObserver = new MutationObserver(
-          (mutations, observer) { expect(false, isTrue,
-              reason: 'Should not be reached'); });
-      expect(() { mutationObserver.observe(document); },
-             throws);
-    });
-
-    test('direct-parallel options-named', () {
-      var container = new DivElement();
-      var div1 = new DivElement();
-      var div2 = new DivElement();
-      var mutationObserver = new MutationObserver(
-          mutationCallback(2, orderedEquals([div1, div2])));
-      mutationObserver.observe(container, childList: true);
-
-      container.append(div1);
-      container.append(div2);
-    });
-
-    test('direct-nested options-named', () {
-      var container = new DivElement();
-      var div1 = new DivElement();
-      var div2 = new DivElement();
-      var mutationObserver =
-          new MutationObserver(mutationCallback(1, orderedEquals([div1])));
-      mutationObserver.observe(container, childList: true);
-
-      container.append(div1);
-      div1.append(div2);
-    });
-
-    test('subtree options-named', () {
-      var container = new DivElement();
-      var div1 = new DivElement();
-      var div2 = new DivElement();
-      var mutationObserver = new MutationObserver(
-          mutationCallback(2, orderedEquals([div1, div2])));
-      mutationObserver.observe(container, childList: true, subtree: true);
-
-      container.append(div1);
-      div1.append(div2);
-    });
-  });
-}