Remove generated directories with 100s of files.

client/html/generated/html/dartium/KeyboardEvent.dart

Index: client/html/generated/html/dartium/KeyboardEvent.dart
diff --git a/client/html/generated/html/dartium/KeyboardEvent.dart b/client/html/generated/html/dartium/KeyboardEvent.dart
deleted file mode 100644
index 5054b08e5a0c8a332d610c8e8cb9dfd1e1b8edd4..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/KeyboardEvent.dart
+++ /dev/null
@@ -1,23 +0,0 @@
-
-class _KeyboardEventImpl extends _UIEventImpl implements KeyboardEvent {
-  _KeyboardEventImpl._wrap(ptr) : super._wrap(ptr);
-
-  bool get altGraphKey() => _wrap(_ptr.altGraphKey);
-
-  bool get altKey() => _wrap(_ptr.altKey);
-
-  bool get ctrlKey() => _wrap(_ptr.ctrlKey);
-
-  String get keyIdentifier() => _wrap(_ptr.keyIdentifier);
-
-  int get keyLocation() => _wrap(_ptr.keyLocation);
-
-  bool get metaKey() => _wrap(_ptr.metaKey);
-
-  bool get shiftKey() => _wrap(_ptr.shiftKey);
-
-  void initKeyboardEvent(String type, bool canBubble, bool cancelable, Window view, String keyIdentifier, int keyLocation, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool altGraphKey) {
-    _ptr.initKeyboardEvent(_unwrap(type), _unwrap(canBubble), _unwrap(cancelable), _unwrap(view), _unwrap(keyIdentifier), _unwrap(keyLocation), _unwrap(ctrlKey), _unwrap(altKey), _unwrap(shiftKey), _unwrap(metaKey), _unwrap(altGraphKey));
-    return;
-  }
-}