Remove generated directories with 100s of files.

client/html/generated/html/dartium/MetaElement.dart

Index: client/html/generated/html/dartium/MetaElement.dart
diff --git a/client/html/generated/html/dartium/MetaElement.dart b/client/html/generated/html/dartium/MetaElement.dart
deleted file mode 100644
index 1c03c853aec13e7962abb8d2438cd48105f8e32d..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/MetaElement.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-
-class _MetaElementImpl extends _ElementImpl implements MetaElement {
-  _MetaElementImpl._wrap(ptr) : super._wrap(ptr);
-
-  String get content() => _wrap(_ptr.content);
-
-  void set content(String value) { _ptr.content = _unwrap(value); }
-
-  String get httpEquiv() => _wrap(_ptr.httpEquiv);
-
-  void set httpEquiv(String value) { _ptr.httpEquiv = _unwrap(value); }
-
-  String get name() => _wrap(_ptr.name);
-
-  void set name(String value) { _ptr.name = _unwrap(value); }
-
-  String get scheme() => _wrap(_ptr.scheme);
-
-  void set scheme(String value) { _ptr.scheme = _unwrap(value); }
-}