DirectorObjectForm: skip timeperiod range params...

...on redirect after removal. TimeperiodRange::getOnDeleteUrl would
be a better place for this, but I do not like that solution either :p

fixes #12316

library/Director/Web/Form/DirectorObjectForm.php

@@ -868,7 +868,7 @@ abstract class DirectorObjectForm extends QuickForm
             $url = $object->getOnDeleteUrl();
         } else {
             $url = $this->getSuccessUrl()->without(
-                array('field_id', 'argument_id')
+                array('field_id', 'argument_id', 'range', 'range_type')
             );
         }