dropped unused node_services_with_rev/2 function

Change-Id: I1e39efa6464f7a0b65170f7562e93233710104a8
Reviewed-on: http://review.couchbase.org/44633
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>