Revert "Wrote functions to convert collections and maps to strings and invoked"

corelib/src/implementation/queue.dart

Index: corelib/src/implementation/queue.dart
diff --git a/corelib/src/implementation/queue.dart b/corelib/src/implementation/queue.dart
index 82e4dd094f51700948b26898b136372dc1544bd0..d1cc14c00e65e4d005dd7934dd64c79140cea467 100644
--- a/corelib/src/implementation/queue.dart
+++ b/corelib/src/implementation/queue.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2011, 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.
 
@@ -231,10 +231,6 @@ class DoubleLinkedQueue<E> implements Queue<E> {
   _DoubleLinkedQueueIterator<E> iterator() {
     return new _DoubleLinkedQueueIterator<E>(_sentinel);
   }
-
-  String toString() {
-    return Collections.collectionToString(this);
-  }
 }
 
 class _DoubleLinkedQueueIterator<E> implements Iterator<E> {