revert xmloff portion of

commit 35e68754
Author: Noel Grandin <noel@peralex.com>
Date:   Thu Oct 1 15:10:56 2015 +0200

    loplugin:unusedmethods

    Change-Id: I3d6f1300f4fae2af9e580d1d3b2c2c80fa9e9268
    Reviewed-on: https://gerrit.libreoffice.org/19075Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>

Change-Id: I24aa3f113a77d93c789b063b3c099bf2038e1dad