Remove generated directories with 100s of files.

client/html/generated/html/frog/MouseEvent.dart

Index: client/html/generated/html/frog/MouseEvent.dart
diff --git a/client/html/generated/html/frog/MouseEvent.dart b/client/html/generated/html/frog/MouseEvent.dart
deleted file mode 100644
index 5b152aa6f1aa08141e9933bf7881292f1b3308f6..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/MouseEvent.dart
+++ /dev/null
@@ -1,41 +0,0 @@
-
-class _MouseEventImpl extends _UIEventImpl implements MouseEvent native "*MouseEvent" {
-
-  final bool altKey;
-
-  final int button;
-
-  final int clientX;
-
-  final int clientY;
-
-  final bool ctrlKey;
-
-  final _ClipboardImpl dataTransfer;
-
-  final _NodeImpl fromElement;
-
-  final bool metaKey;
-
-  final int offsetX;
-
-  final int offsetY;
-
-  _EventTargetImpl get relatedTarget() => _FixHtmlDocumentReference(_relatedTarget);
-
-  _EventTargetImpl get _relatedTarget() native "return this.relatedTarget;";
-
-  final int screenX;
-
-  final int screenY;
-
-  final bool shiftKey;
-
-  final _NodeImpl toElement;
-
-  final int x;
-
-  final int y;
-
-  void _initMouseEvent(String type, bool canBubble, bool cancelable, _WindowImpl view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, int button, _EventTargetImpl relatedTarget) native "this.initMouseEvent(type, canBubble, cancelable, view, detail, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey, button, relatedTarget);";
-}