Remove unused import.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1565272 13f79535-47bb-0310-9956-ffa450edef68
JENA-633.  Safe fix; further optimizations may be possible

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1565274 13f79535-47bb-0310-9956-ffa450edef68