Remove access to undefined property in case task form

Author: jensschuppe

CRM/Civioffice/Form/Task/CreateCaseDocuments.php

@@ -26,6 +26,5 @@ public function preProcess()
     {
         parent::preProcess();
         $this->entityType = 'Case';
-        $this->entityIds = $this->_caseIds;
     }
 }