Remove must be root statement from buildah doc
Remove must be root statement from buildah doc

Signed-off-by: Dan Mack <mack@macktronics.com>

Closes: #1573
Approved by: TomSweeneyRedHat

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