Remove generated directories with 100s of files.

client/html/generated/html/frog/MessagePort.dart

Index: client/html/generated/html/frog/MessagePort.dart
diff --git a/client/html/generated/html/frog/MessagePort.dart b/client/html/generated/html/frog/MessagePort.dart
deleted file mode 100644
index c73eabff770539e66f432a974e37a473cdd0b47e..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/MessagePort.dart
+++ /dev/null
@@ -1,26 +0,0 @@
-
-class _MessagePortImpl extends _EventTargetImpl implements MessagePort native "*MessagePort" {
-
-  _MessagePortEventsImpl get on() =>
-    new _MessagePortEventsImpl(this);
-
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
-
-  void close() native;
-
-  bool _dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
-
-  void postMessage(String message, [List messagePorts = null]) native;
-
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
-
-  void start() native;
-
-  void webkitPostMessage(String message, [List transfer = null]) native;
-}
-
-class _MessagePortEventsImpl extends _EventsImpl implements MessagePortEvents {
-  _MessagePortEventsImpl(_ptr) : super(_ptr);
-
-  EventListenerList get message() => _get('message');
-}