apache: Remove old comments referencing 'yaseo'

See https://wikitech.wikimedia.org/wiki/Obsolete:Yahoo_cluster

These references were already removed in the main Apache
configuration files, but the ones copied for 'beta' still had
these (weird, as that never had any sort of relation to yaseo).

Change-Id: Ia5bbac42712500d681b7a96e870997248b34a00c