Remove generated directories with 100s of files.

client/html/generated/html/frog/_OptionElementFactoryProvider.dart

Index: client/html/generated/html/frog/_OptionElementFactoryProvider.dart
diff --git a/client/html/generated/html/frog/_OptionElementFactoryProvider.dart b/client/html/generated/html/frog/_OptionElementFactoryProvider.dart
deleted file mode 100644
index eba002cab0228afe981c27b4e46c3463fa0cc200..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/_OptionElementFactoryProvider.dart
+++ /dev/null
@@ -1,15 +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.
-
-class _OptionElementFactoryProvider {
-  factory OptionElement([String data = null, String value = null,
-                         bool defaultSelected = null, bool selected = null])
-      native '''
-          if (data == null) return new Option();
-          if (value == null) return new Option(data);
-          if (defaultSelected == null) return new Option(data, value);
-          if (selected == null) return new Option(data, value, defaultSelected);
-          return new Option(data, value, defaultSelected, selected);
-      ''';
-}