Remove generated directories with 100s of files.

client/html/generated/html/dartium/TreeWalker.dart

Index: client/html/generated/html/dartium/TreeWalker.dart
diff --git a/client/html/generated/html/dartium/TreeWalker.dart b/client/html/generated/html/dartium/TreeWalker.dart
deleted file mode 100644
index 0ab723db15491a9e956d3176cf4fef31c327ad87..0000000000000000000000000000000000000000
--- a/client/html/generated/html/dartium/TreeWalker.dart
+++ /dev/null
@@ -1,44 +0,0 @@
-
-class _TreeWalkerImpl extends _DOMTypeBase implements TreeWalker {
-  _TreeWalkerImpl._wrap(ptr) : super._wrap(ptr);
-
-  Node get currentNode() => _wrap(_ptr.currentNode);
-
-  void set currentNode(Node value) { _ptr.currentNode = _unwrap(value); }
-
-  bool get expandEntityReferences() => _wrap(_ptr.expandEntityReferences);
-
-  NodeFilter get filter() => _wrap(_ptr.filter);
-
-  Node get root() => _wrap(_ptr.root);
-
-  int get whatToShow() => _wrap(_ptr.whatToShow);
-
-  Node firstChild() {
-    return _wrap(_ptr.firstChild());
-  }
-
-  Node lastChild() {
-    return _wrap(_ptr.lastChild());
-  }
-
-  Node nextNode() {
-    return _wrap(_ptr.nextNode());
-  }
-
-  Node nextSibling() {
-    return _wrap(_ptr.nextSibling());
-  }
-
-  Node parentNode() {
-    return _wrap(_ptr.parentNode());
-  }
-
-  Node previousNode() {
-    return _wrap(_ptr.previousNode());
-  }
-
-  Node previousSibling() {
-    return _wrap(_ptr.previousSibling());
-  }
-}