remove unused connect_and_send_* functions from ns_memcached
remove unused connect_and_send_* functions from ns_memcached

Change-Id: I5fcba62f09f43c336674d4f31b649dd9412510fc
Reviewed-on: http://review.couchbase.org/78618
Reviewed-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>
Tested-by: Artem Stemkovski <15a0730a27c69f62ab86f2b6c639fca202166c02@couchbase.com>

membase/ns_server,membase/ns_server,membase/ns_server,membase/ns_server,membase/ns_server,membase/ns_server