KDE: don't throw on TemplatePathVariable

This is required after commit
838b77f5f3d6d8fd98891e99a23ff78a6a357cb2.

Actual functionality is still missing.

Change-Id: Ib94d8a982609de730d9c61bf7bf9886093c51f5b
Reviewed-on: https://gerrit.libreoffice.org/8367
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>