Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/frog/MediaStream.dart
diff --git a/client/dom/generated/src/frog/MediaStream.dart b/client/dom/generated/src/frog/MediaStream.dart
deleted file mode 100644
index b084a070b598b29a9ae50e9a87a36bb70850a636..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/frog/MediaStream.dart
+++ /dev/null
@@ -1,23 +0,0 @@
-
-class _MediaStreamJs extends _DOMTypeJs implements MediaStream native "*MediaStream" {
-
-  static final int ENDED = 2;
-
-  static final int LIVE = 1;
-
-  final _MediaStreamTrackListJs audioTracks;
-
-  final String label;
-
-  EventListener onended;
-
-  final int readyState;
-
-  final _MediaStreamTrackListJs videoTracks;
-
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-
-  bool dispatchEvent(_EventJs event) native;
-
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
-}