and drop unused SRCH_LEVDIST enumerator

Change-Id: Ic5118757060656562e04dd7da24a3f143abec3fb
Reviewed-on: https://gerrit.libreoffice.org/34065Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>