Remove unused 'use' statement

Author: Wout Gevaert

src/Functions/RawFunction.php

@@ -38,7 +38,6 @@
 use WikibaseSolutions\CypherDSL\Types\PropertyTypes\StringType;
 use WikibaseSolutions\CypherDSL\Types\StructuralTypes\NodeType;
 use WikibaseSolutions\CypherDSL\Types\StructuralTypes\PathType;
-use WikibaseSolutions\CypherDSL\ErrorHandling\ErrorTextHelper;
 
 /**
  * This class represents any function call.