Remove visual noise from pyuno

Change-Id: I27f5edf45d5968879436e2466f953576651ed8ae
Reviewed-on: https://gerrit.libreoffice.org/8290
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>