remove unused args/kwargs

looks like we don't pass anything to helper

Change-Id: I245d858b1f4704c32d4f49d6840ec19f40d40f5f
Reviewed-on: http://review.couchbase.org/37143
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Li Yang <lichenyang2@gmail.com>