Remove generated directories with 100s of files.

client/html/generated/html/interface/OESVertexArrayObject.dart

Index: client/html/generated/html/interface/OESVertexArrayObject.dart
diff --git a/client/html/generated/html/interface/OESVertexArrayObject.dart b/client/html/generated/html/interface/OESVertexArrayObject.dart
deleted file mode 100644
index c407df7b3308ca631759fed23b7c8d37aa389175..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/OESVertexArrayObject.dart
+++ /dev/null
@@ -1,18 +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 OESVertexArrayObject {
-
-  static final int VERTEX_ARRAY_BINDING_OES = 0x85B5;
-
-  void bindVertexArrayOES(WebGLVertexArrayObjectOES arrayObject);
-
-  WebGLVertexArrayObjectOES createVertexArrayOES();
-
-  void deleteVertexArrayOES(WebGLVertexArrayObjectOES arrayObject);
-
-  bool isVertexArrayOES(WebGLVertexArrayObjectOES arrayObject);
-}