Remove generated directories with 100s of files.

client/html/generated/html/frog/Notification.dart

Index: client/html/generated/html/frog/Notification.dart
diff --git a/client/html/generated/html/frog/Notification.dart b/client/html/generated/html/frog/Notification.dart
deleted file mode 100644
index 166f9b310082f5a050329d02618190b1bf60924e..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/Notification.dart
+++ /dev/null
@@ -1,28 +0,0 @@
-
-class _NotificationImpl extends _EventTargetImpl implements Notification native "*Notification" {
-
-  _NotificationEventsImpl get on() =>
-    new _NotificationEventsImpl(this);
-
-  String dir;
-
-  String replaceId;
-
-  void cancel() native;
-
-  void show() native;
-}
-
-class _NotificationEventsImpl extends _EventsImpl implements NotificationEvents {
-  _NotificationEventsImpl(_ptr) : super(_ptr);
-
-  EventListenerList get click() => _get('click');
-
-  EventListenerList get close() => _get('close');
-
-  EventListenerList get display() => _get('display');
-
-  EventListenerList get error() => _get('error');
-
-  EventListenerList get show() => _get('show');
-}