Remove generated directories with 100s of files.

client/html/generated/html/frog/TextTrack.dart

Index: client/html/generated/html/frog/TextTrack.dart
diff --git a/client/html/generated/html/frog/TextTrack.dart b/client/html/generated/html/frog/TextTrack.dart
deleted file mode 100644
index 43954bda7190f9f29859a92c414892377f70c403..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/TextTrack.dart
+++ /dev/null
@@ -1,33 +0,0 @@
-
-class _TextTrackImpl implements TextTrack native "*TextTrack" {
-
-  static final int DISABLED = 0;
-
-  static final int HIDDEN = 1;
-
-  static final int SHOWING = 2;
-
-  final _TextTrackCueListImpl activeCues;
-
-  final _TextTrackCueListImpl cues;
-
-  final String kind;
-
-  final String label;
-
-  final String language;
-
-  int mode;
-
-  EventListener oncuechange;
-
-  void addCue(_TextTrackCueImpl cue) native;
-
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-
-  bool dispatchEvent(_EventImpl evt) native;
-
-  void removeCue(_TextTrackCueImpl cue) native;
-
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-}