Cirrus: Remove bors artifacts
Cirrus: Remove bors artifacts

Remove several artifacts necessary for bors functionality. Since bors
was removed/disabled, these items are no-longer necessary.

Signed-off-by: Chris Evich <352d8596d782a469eafa66a46434e15a449859ce@redhat.com>

nalind/buildah-1,rhatdan/buildah,TomSweeneyRedHat/buildah,projectatomic/buildah,rhatdan/buildah,nalind/buildah,nalind/buildah-1,projectatomic/buildah,projectatomic/buildah,rhatdan/buildah,TomSweeneyRedHat/buildah,nalind/buildah,nalind/buildah-1,TomSweeneyRedHat/buildah