Remove files that have already been ported or do not need to be ported.

client/html/src/GlobalProperties.dart

Index: client/html/src/GlobalProperties.dart
diff --git a/client/html/src/GlobalProperties.dart b/client/html/src/GlobalProperties.dart
deleted file mode 100644
index 848eb433def91bce0d8cb5c579668ea06e7a7162..0000000000000000000000000000000000000000
--- a/client/html/src/GlobalProperties.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-// 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.
-
-Window secretWindow;
-Document secretDocument;
-
-Window get window() {
-  if (secretWindow === null) {
-    LevelDom.initialize();
-  }
-  return secretWindow;
-}
-
-Document get document() {
-  if (secretWindow === null) {
-    LevelDom.initialize();
-  }
-  return secretDocument;
-}