Remove generated directories with 100s of files.

client/html/generated/html/frog/AbstractWorker.dart

Index: client/html/generated/html/frog/AbstractWorker.dart
diff --git a/client/html/generated/html/frog/AbstractWorker.dart b/client/html/generated/html/frog/AbstractWorker.dart
deleted file mode 100644
index 8c23e654b93ea98f78db7723b3047f770a3872ab..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/AbstractWorker.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-
-class _AbstractWorkerImpl extends _EventTargetImpl implements AbstractWorker native "*AbstractWorker" {
-
-  _AbstractWorkerEventsImpl get on() =>
-    new _AbstractWorkerEventsImpl(this);
-
-  void _addEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.addEventListener(type, listener, useCapture);";
-
-  bool _dispatchEvent(_EventImpl evt) native "return this.dispatchEvent(evt);";
-
-  void _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
-}
-
-class _AbstractWorkerEventsImpl extends _EventsImpl implements AbstractWorkerEvents {
-  _AbstractWorkerEventsImpl(_ptr) : super(_ptr);
-
-  EventListenerList get error() => _get('error');
-}