Remove unused variable declaration.

chrome/browser/bookmarks/bookmark_model_test_utils.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/bookmarks/bookmark_model_test_utils.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/gurl.h"
@@ skipping 97 matching lines @@
   }
   return child_string;
 }
 
 // static
 void BookmarkModelTestUtils::AddNodesFromModelString(
     BookmarkModel* model,
     const BookmarkNode* node,
     const std::string& model_string) {
   DCHECK(node);
-  const std::string folder_tell(":[");
   std::string::size_type start_pos = 0;
   std::string::size_type end_pos =
       AddNodesFromString(model, node, model_string, start_pos);
   DCHECK(end_pos == std::string::npos);
 }