This reverts parts of
    commit 867a22fd
    Date:   Wed Mar 28 10:00:30 2018 +0200
    loplugin:virtualdown in xmloff/xmlsecurity
and
    commit 73e6a797
    Date:   Thu Mar 29 09:35:22 2018 +0200
    loplugin:unusedmethods

Change-Id: Id4230fafc10bbfe5822f7011a1b1d3d9dff30735
Reviewed-on: https://gerrit.libreoffice.org/53149Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>