Remove requires for ostree-lib in rpm spec file
Remove requires for ostree-lib in rpm spec file

I stupidly added this in a previous patch. rpm figures this
out for you so no need to specify.  On RHEL systems ostree-libs
does not exist.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #551
Approved by: rhatdan

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