Remove Collection, Collections and clean up List/Set/Queue implementations of retain/remove.

tools/dom/src/WrappedList.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.
 
 part of dart.dom.html;
 
 /**
  * A list which just wraps another list, for either intercepting list calls or
  * retyping the list (for example, from List<A> to List<B> where B extends A).
  */
@@ skipping 62 matching lines @@
   E elementAt(int index) => _list.elementAt(index);
 
   // Collection APIs
 
   void add(E element) { _list.add(element); }
 
   void addAll(Iterable<E> elements) { _list.addAll(elements); }
 
   void remove(Object element) { _list.remove(element); }
 
-  void removeAll(Iterable elements) { _list.removeAll(elements); }
-
-  void retainAll(Iterable elements) { _list.retainAll(elements); }
-
   void removeWhere(bool test(E element)) { _list.removeWhere(test); }
 
   void retainWhere(bool test(E element)) { _list.retainWhere(test); }
 
   void clear() { _list.clear(); }
 
   // List APIs
 
   E operator [](int index) => _list[index];
 
@@ skipping 46 matching lines @@
   Iterator _iterator;
 
   _WrappedIterator(this._iterator);
 
   bool moveNext() {
     return _iterator.moveNext();
   }
 
   E get current => _iterator.current;
 }