Remove generated directories with 100s of files.

client/dom/generated/src/frog/TextTrack.dart

Index: client/dom/generated/src/frog/TextTrack.dart
diff --git a/client/dom/generated/src/frog/TextTrack.dart b/client/dom/generated/src/frog/TextTrack.dart
deleted file mode 100644
index eca0680585a4f278fb2e84b821999e0d108c06e1..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/frog/TextTrack.dart
+++ /dev/null
@@ -1,33 +0,0 @@
-
-class _TextTrackJs extends _DOMTypeJs implements TextTrack native "*TextTrack" {
-
-  static final int DISABLED = 0;
-
-  static final int HIDDEN = 1;
-
-  static final int SHOWING = 2;
-
-  final _TextTrackCueListJs activeCues;
-
-  final _TextTrackCueListJs cues;
-
-  final String kind;
-
-  final String label;
-
-  final String language;
-
-  int mode;
-
-  EventListener oncuechange;
-
-  void addCue(_TextTrackCueJs cue) native;
-
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-
-  bool dispatchEvent(_EventJs evt) native;
-
-  void removeCue(_TextTrackCueJs cue) native;
-
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-}