Fix lib/core/core.dart and lib/coreimpl/coreimpl.dart files.

lib/coreimpl/coreimpl.dart

Index: lib/coreimpl/coreimpl.dart
diff --git a/lib/coreimpl/coreimpl.dart b/lib/coreimpl/coreimpl.dart
index 829302b4f2e99d3298842c28b5be25001765caf9..86433d63ed227af7950ac7b415d289d13482e54a 100644
--- a/lib/coreimpl/coreimpl.dart
+++ b/lib/coreimpl/coreimpl.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2012, 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("dart:coreimpl");
 #import("dart:math");
 #source("arrays.dart");
@@ -12,7 +16,6 @@
 #source("linked_hash_map.dart");
 #source("list.dart");
 #source("maps.dart");
-#source("object.dart");
 #source("options.dart");
 #source("print.dart");
 #source("queue.dart");