Remove generated directories with 100s of files.

client/html/generated/html/dartium/UIEvent.dart

Index: client/html/generated/html/dartium/UIEvent.dart
diff --git a/client/html/generated/html/dartium/UIEvent.dart b/client/html/generated/html/dartium/UIEvent.dart
deleted file mode 100644
index 6fa91161fad49f388cdc9b58794bd0bdddeed740..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/UIEvent.dart
+++ /dev/null
@@ -1,27 +0,0 @@
-
-class _UIEventImpl extends _EventImpl implements UIEvent {
-  _UIEventImpl._wrap(ptr) : super._wrap(ptr);
-
-  int get charCode() => _wrap(_ptr.charCode);
-
-  int get detail() => _wrap(_ptr.detail);
-
-  int get keyCode() => _wrap(_ptr.keyCode);
-
-  int get layerX() => _wrap(_ptr.layerX);
-
-  int get layerY() => _wrap(_ptr.layerY);
-
-  int get pageX() => _wrap(_ptr.pageX);
-
-  int get pageY() => _wrap(_ptr.pageY);
-
-  Window get view() => _wrap(_ptr.view);
-
-  int get which() => _wrap(_ptr.which);
-
-  void initUIEvent(String type, bool canBubble, bool cancelable, Window view, int detail) {
-    _ptr.initUIEvent(_unwrap(type), _unwrap(canBubble), _unwrap(cancelable), _unwrap(view), _unwrap(detail));
-    return;
-  }
-}