Remove tarball as an option from buildah push --help
Remove tarball as an option from buildah push --help

pushing to the tarball transport is not supported, so removing
the option from the inline help

Signed-off-by: umohnani8 <umohnani@redhat.com>

Closes: #583
Approved by: rhatdan

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