Remove generated directories with 100s of files.

client/html/generated/html/interface/TableColElement.dart

Index: client/html/generated/html/interface/TableColElement.dart
diff --git a/client/html/generated/html/interface/TableColElement.dart b/client/html/generated/html/interface/TableColElement.dart
deleted file mode 100644
index 78e565de1156fcb3f0c2c651887fcd023b5294e5..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/TableColElement.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-// 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.
-
-// WARNING: Do not edit - generated code.
-
-interface TableColElement extends Element {
-
-  String align;
-
-  String ch;
-
-  String chOff;
-
-  int span;
-
-  String vAlign;
-
-  String width;
-}