Remove generated directories with 100s of files.

client/html/generated/html/frog/EventSource.dart

Index: client/html/generated/html/frog/EventSource.dart
diff --git a/client/html/generated/html/frog/EventSource.dart b/client/html/generated/html/frog/EventSource.dart
deleted file mode 100644
index 315880844c62711e9b1507e0eac300b3f98b56d6..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/EventSource.dart
+++ /dev/null
@@ -1,36 +0,0 @@
-
-class _EventSourceImpl extends _EventTargetImpl implements EventSource native "*EventSource" {
-
-  _EventSourceEventsImpl get on() =>
-    new _EventSourceEventsImpl(this);
-
-  static final int CLOSED = 2;
-
-  static final int CONNECTING = 0;
-
-  static final int OPEN = 1;
-
-  final String URL;
-
-  final int readyState;
-
-  final String url;
-
-  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 _removeEventListener(String type, EventListener listener, [bool useCapture = null]) native "this.removeEventListener(type, listener, useCapture);";
-}
-
-class _EventSourceEventsImpl extends _EventsImpl implements EventSourceEvents {
-  _EventSourceEventsImpl(_ptr) : super(_ptr);
-
-  EventListenerList get error() => _get('error');
-
-  EventListenerList get message() => _get('message');
-
-  EventListenerList get open() => _get('open');
-}