cleanup: this test doesn't need UnitTestUtil.

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@1010 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/dns/cpp/tests/rrsetlist_unittest.cc

@@ -27,9 +27,6 @@
 
 #include <gtest/gtest.h>
 
-#include "unittest_util.h"
-
-using isc::UnitTestUtil;
 using namespace std;
 using namespace isc::dns;
 using namespace isc::dns::rdata;