Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/frog/MouseEvent.dart
diff --git a/client/dom/generated/src/frog/MouseEvent.dart b/client/dom/generated/src/frog/MouseEvent.dart
deleted file mode 100644
index 2702b8cbc1438a862955a5ed0dbefc3d61c76865..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/frog/MouseEvent.dart
+++ /dev/null
@@ -1,39 +0,0 @@
-
-class _MouseEventJs extends _UIEventJs implements MouseEvent native "*MouseEvent" {
-
-  final bool altKey;
-
-  final int button;
-
-  final int clientX;
-
-  final int clientY;
-
-  final bool ctrlKey;
-
-  final _ClipboardJs dataTransfer;
-
-  final _NodeJs fromElement;
-
-  final bool metaKey;
-
-  final int offsetX;
-
-  final int offsetY;
-
-  final _EventTargetJs relatedTarget;
-
-  final int screenX;
-
-  final int screenY;
-
-  final bool shiftKey;
-
-  final _NodeJs toElement;
-
-  final int x;
-
-  final int y;
-
-  void initMouseEvent(String type, bool canBubble, bool cancelable, _DOMWindowJs view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, int button, _EventTargetJs relatedTarget) native;
-}