Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/frog/KeyboardEvent.dart
diff --git a/client/dom/generated/src/frog/KeyboardEvent.dart b/client/dom/generated/src/frog/KeyboardEvent.dart
deleted file mode 100644
index d539871436ccdb21aa6f83209b653450f563ec83..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/frog/KeyboardEvent.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-
-class _KeyboardEventJs extends _UIEventJs implements KeyboardEvent native "*KeyboardEvent" {
-
-  final bool altGraphKey;
-
-  final bool altKey;
-
-  final bool ctrlKey;
-
-  final String keyIdentifier;
-
-  final int keyLocation;
-
-  final bool metaKey;
-
-  final bool shiftKey;
-
-  void initKeyboardEvent(String type, bool canBubble, bool cancelable, _DOMWindowJs view, String keyIdentifier, int keyLocation, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool altGraphKey) native;
-}