rm chroot/util.go
rm chroot/util.go

The last remaining function is not being used anymore.

Reported by golangci-lint.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

Closes: #1678
Approved by: rhatdan

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