Which is always set to nullptr, is passed around, finally just ignored.

Change-Id: I81aecbed33ea249e63fbb412a54345fbb8335e47
Reviewed-on: https://gerrit.libreoffice.org/36662Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>