Remove generated directories with 100s of files.

client/html/generated/html/dartium/HRElement.dart

Index: client/html/generated/html/dartium/HRElement.dart
diff --git a/client/html/generated/html/dartium/HRElement.dart b/client/html/generated/html/dartium/HRElement.dart
deleted file mode 100644
index 5e519a3c49d41f70f48e47419bcc0f2c2225dca5..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/HRElement.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-
-class _HRElementImpl extends _ElementImpl implements HRElement {
-  _HRElementImpl._wrap(ptr) : super._wrap(ptr);
-
-  String get align() => _wrap(_ptr.align);
-
-  void set align(String value) { _ptr.align = _unwrap(value); }
-
-  bool get noShade() => _wrap(_ptr.noShade);
-
-  void set noShade(bool value) { _ptr.noShade = _unwrap(value); }
-
-  String get size() => _wrap(_ptr.size);
-
-  void set size(String value) { _ptr.size = _unwrap(value); }
-
-  String get width() => _wrap(_ptr.width);
-
-  void set width(String value) { _ptr.width = _unwrap(value); }
-}