Remove generated directories with 100s of files.

client/html/generated/html/dartium/DocumentFragment.dart

Index: client/html/generated/html/dartium/DocumentFragment.dart
diff --git a/client/html/generated/html/dartium/DocumentFragment.dart b/client/html/generated/html/dartium/DocumentFragment.dart
deleted file mode 100644
index 1022829d1133c83838bc7f7cca6201ae35bae023..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/DocumentFragment.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-
-class _DocumentFragmentImpl extends _NodeImpl implements DocumentFragment {
-  _DocumentFragmentImpl._wrap(ptr) : super._wrap(ptr);
-
-  _ElementEventsImpl get on() {
-    if (_on == null) _on = new _ElementEventsImpl(this);
-    return _on;
-  }
-
-  Element query(String selectors) {
-    return _wrap(_ptr.querySelector(_unwrap(selectors)));
-  }
-
-  NodeList _querySelectorAll(String selectors) {
-    return _wrap(_ptr.querySelectorAll(_unwrap(selectors)));
-  }
-}