Remove no longer needed import

Author: JeroenDeDauw

src/Statement/StatementList.php

@@ -5,7 +5,6 @@
 use InvalidArgumentException;
 use Traversable;
 use Wikibase\DataModel\Claim\Claims;
-use Wikibase\DataModel\Statement\Statement;
 use Wikibase\DataModel\Entity\PropertyId;
 use Wikibase\DataModel\Reference;
 use Wikibase\DataModel\ReferenceList;