Remove generated directories with 100s of files.

client/html/generated/html/frog/VideoElement.dart

Index: client/html/generated/html/frog/VideoElement.dart
diff --git a/client/html/generated/html/frog/VideoElement.dart b/client/html/generated/html/frog/VideoElement.dart
deleted file mode 100644
index c874304d349c31593a8801201438b256c46af06c..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/VideoElement.dart
+++ /dev/null
@@ -1,29 +0,0 @@
-
-class _VideoElementImpl extends _MediaElementImpl implements VideoElement native "*HTMLVideoElement" {
-
-  int height;
-
-  String poster;
-
-  final int videoHeight;
-
-  final int videoWidth;
-
-  final int webkitDecodedFrameCount;
-
-  final bool webkitDisplayingFullscreen;
-
-  final int webkitDroppedFrameCount;
-
-  final bool webkitSupportsFullscreen;
-
-  int width;
-
-  void webkitEnterFullScreen() native;
-
-  void webkitEnterFullscreen() native;
-
-  void webkitExitFullScreen() native;
-
-  void webkitExitFullscreen() native;
-}