Simplified the non-streaming UpdateAction method

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1442727 13f79535-47bb-0310-9956-ffa450edef68
Remove unused import

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1442728 13f79535-47bb-0310-9956-ffa450edef68