This service is only used in xmlsecurity and it's a wrapper around two
free functions in the same module.

Change-Id: Ibc5a026b51eda6c2b4b27b7254dedc220dbf909a
Reviewed-on: https://gerrit.libreoffice.org/34772Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>