Remove generated directories with 100s of files.

client/html/generated/html/dartium/StyleSheet.dart

Index: client/html/generated/html/dartium/StyleSheet.dart
diff --git a/client/html/generated/html/dartium/StyleSheet.dart b/client/html/generated/html/dartium/StyleSheet.dart
deleted file mode 100644
index dc0e253327c03078e231a255e8d70ce8058041a4..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/StyleSheet.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-
-class _StyleSheetImpl extends _DOMTypeBase implements StyleSheet {
-  _StyleSheetImpl._wrap(ptr) : super._wrap(ptr);
-
-  bool get disabled() => _wrap(_ptr.disabled);
-
-  void set disabled(bool value) { _ptr.disabled = _unwrap(value); }
-
-  String get href() => _wrap(_ptr.href);
-
-  MediaList get media() => _wrap(_ptr.media);
-
-  Node get ownerNode() => _wrap(_ptr.ownerNode);
-
-  StyleSheet get parentStyleSheet() => _wrap(_ptr.parentStyleSheet);
-
-  String get title() => _wrap(_ptr.title);
-
-  String get type() => _wrap(_ptr.type);
-}