MB-100: killed addr_util.erl

It was only used by old windows register_service.bat but not anymore.

Change-Id: Ia2b7ca63f769ab9201fe4ad7a6e1717d43d9ea54
Reviewed-on: http://review.couchbase.org/25502
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>