Remove generated directories with 100s of files.

client/html/generated/html/interface/ProgressEvent.dart

Index: client/html/generated/html/interface/ProgressEvent.dart
diff --git a/client/html/generated/html/interface/ProgressEvent.dart b/client/html/generated/html/interface/ProgressEvent.dart
deleted file mode 100644
index 504eb3af1f7ded60c246ec1f3e4a9dbbe72f053e..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/ProgressEvent.dart
+++ /dev/null
@@ -1,14 +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 ProgressEvent extends Event {
-
-  final bool lengthComputable;
-
-  final int loaded;
-
-  final int total;
-}