oop: remove unused attributes

Change-Id: I35f3fae66a4ec71dea99f22d7e085f811f1e1b55
Signed-off-by: Yeela Kaplan <ykaplan@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/26174
Reviewed-by: Dan Kenigsberg <danken@redhat.com>