group_vars: rm Infernalis comment

group_vars: rm Infernalis comment

As of Infernalis, the Ceph daemons run as an unprivileged "ceph" UID,
and this is by design.

Commit f19b765f7995dab4aca46e1885320dc440485ead altered the default
civetweb port from 80 to 8080 with a comment in the commit log about
"until this gets solved"

Remove the comment about permissions on Infernalis, because this is
always going to be the case on the Ceph versions we support, and it
is just confusing.

If users want to expose civetweb to s3 clients using privileged TCP
ports, they can redirect traffic with iptables, or use a reverse proxy
application like HAproxy.