Remove ctxt from RPC API
Remove ctxt from RPC API

The ctxt was provided by default RPC so there is no need to add
it for RPC API

Change-Id: I199ebc6e981ad0ae73cceb3166079d690fd64554

eshijia/magnum,hongbin/magnum,openstack/magnum,Tennyson53/magnum,paulczar/magnum,dimtruck/magnum,ArchiFleKs/magnum,ffantast/magnum,ddepaoli3/magnum,Tennyson53/SUR,ArchiFleKs/magnum,mjbrewer/testindex,LaynePeng/magnum,Tennyson53/SUR,dimtruck/magnum,ramielrowe/magnum,eshijia/magnum,LaynePeng/magnum,sajuptpm/magnum,eshijia/SUR,Alzon/SUR,ramielrowe/magnum,jay-lau/magnum,mjbrewer/testindex,ddepaoli3/magnum,paulczar/magnum,Tennyson53/magnum,annegentle/magnum,mjbrewer/testindex,ChengTiesheng/magnum,hongbin/magnum,eshijia/SUR,ChengTiesheng/magnum,annegentle/magnum,openstack/magnum,Alzon/SUR,sajuptpm/magnum,ffantast/magnum