don't log error when build image is already deleted
don't log error when build image is already deleted

Signed-off-by: Robert Cerven <32de7a518694880140ad479fa3724b97728d8e88@redhat.com>

jarodwilson/atomic-reactor,projectatomic/atomic-reactor,jarodwilson/atomic-reactor,vrutkovs/atomic-reactor,DBuildService/atomic-reactor,maxamillion/atomic-reactor,fr34k8/atomic-reactor,maxamillion/atomic-reactor,DBuildService/atomic-reactor,projectatomic/atomic-reactor,vrutkovs/atomic-reactor,fr34k8/atomic-reactor