Remove unnecessary use statement

Author: kitsunet

Neos.Flow/Tests/Functional/Persistence/PersistenceTest.php

@@ -13,7 +13,6 @@
 
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\Tools\SchemaTool;
-use Neos\Flow\Configuration\ConfigurationManager;
 use Neos\Flow\Persistence\Doctrine\PersistenceManager;
 use Neos\Flow\Persistence\Doctrine\QueryResult;
 use Neos\Flow\Persistence\Exception;