Remove generated directories with 100s of files.

client/html/generated/html/interface/ClientRect.dart

Index: client/html/generated/html/interface/ClientRect.dart
diff --git a/client/html/generated/html/interface/ClientRect.dart b/client/html/generated/html/interface/ClientRect.dart
deleted file mode 100644
index 4e88a11057f011b07fab58717dfcdaaaab09b32a..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/ClientRect.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 ClientRect {
-
-  final num bottom;
-
-  final num height;
-
-  final num left;
-
-  final num right;
-
-  final num top;
-
-  final num width;
-}