Remove generated directories with 100s of files.

client/html/generated/html/interface/DeviceOrientationEvent.dart

Index: client/html/generated/html/interface/DeviceOrientationEvent.dart
diff --git a/client/html/generated/html/interface/DeviceOrientationEvent.dart b/client/html/generated/html/interface/DeviceOrientationEvent.dart
deleted file mode 100644
index 3c375c48b68793be6b8099931d589e08357b7a9d..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/DeviceOrientationEvent.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 DeviceOrientationEvent extends Event {
-
-  final bool absolute;
-
-  final num alpha;
-
-  final num beta;
-
-  final num gamma;
-
-  void initDeviceOrientationEvent(String type, bool bubbles, bool cancelable, num alpha, num beta, num gamma, bool absolute);
-}