Apply fixes from StyleCI

Neos.Flow/Classes/Persistence/AbstractPersistenceManager.php

@@ -12,7 +12,6 @@
  */
 
 use Neos\Utility\ObjectAccess;
-use Neos\Flow\Persistence\Exception as PersistenceException;
 
 /**
  * The Flow Persistence Manager base class

Neos.Flow/Classes/Persistence/AllowedObjectsContainer.php

@@ -11,8 +11,6 @@
  * source code.
  */
 
-use Neos\Utility\ObjectAccess;
-use Neos\Flow\Persistence\Exception as PersistenceException;
 
 /**
  * A container for the list of allowed objects to be persisted during this request.

Neos.Flow/Classes/Persistence/Doctrine/AllowedObjectsListener.php

@@ -113,5 +113,4 @@ protected function throwExceptionIfObjectIsNotAllowed($object)
             throw new PersistenceException($message, 1377788621);
         }
     }
-
 }

Neos.Flow/Classes/Persistence/Doctrine/PersistenceManager.php

@@ -12,9 +12,7 @@
  */
 
 use Doctrine\DBAL\Connection;
-use Doctrine\DBAL\Exception\ConnectionException;
 use Doctrine\ORM\EntityManagerInterface;
-use Doctrine\ORM\Event\OnFlushEventArgs;
 use Doctrine\ORM\Tools\SchemaTool;
 use Neos\Flow\Annotations as Flow;
 use Neos\Flow\Log\ThrowableStorageInterface;