Remove generated directories with 100s of files.

client/html/generated/html/interface/AudioListener.dart

Index: client/html/generated/html/interface/AudioListener.dart
diff --git a/client/html/generated/html/interface/AudioListener.dart b/client/html/generated/html/interface/AudioListener.dart
deleted file mode 100644
index 10aab32372a31ad7537a58d945486367635370f6..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/AudioListener.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 AudioListener {
-
-  num dopplerFactor;
-
-  num speedOfSound;
-
-  void setOrientation(num x, num y, num z, num xUp, num yUp, num zUp);
-
-  void setPosition(num x, num y, num z);
-
-  void setVelocity(num x, num y, num z);
-}