Remove duplicate .root-markers for prepare-docs-for-afs
Remove duplicate .root-markers for prepare-docs-for-afs

We've already added this file above, lets skip.

Change-Id: I1d59439eb129db337238e55b7e1410f6f33b0430
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

openstack-infra/openstack-zuul-jobs,openstack-infra/openstack-zuul-jobs