OAK-1480: clarify todo

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1572674 13f79535-47bb-0310-9956-ffa450edef68
remove superfluous todo

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1572675 13f79535-47bb-0310-9956-ffa450edef68