cleanup on remote_client
cleanup on remote_client

Remove unused get_files method.

Change-Id: I6c48a0e557602fba8a2b1931ce949af2cdd8aa8c

neerja28/Tempest,xbezdick/tempest,redhat-cip/tempest,eggmaster/tempest,Lilywei123/tempest,hayderimran7/tempest,Juraci/tempest,CiscoSystems/tempest,pczerkas/tempest,pandeyop/tempest,flyingfish007/tempest,queria/my-tempest,jaspreetw/tempest,afaheem88/tempest,masayukig/tempest,jaspreetw/tempest,Tesora/tesora-tempest,zsoltdudas/lis-tempest,FujitsuEnablingSoftwareTechnologyGmbH/tempest,varunarya10/tempest,Vaidyanath/tempest,yamt/tempest,cisco-openstack/tempest,neerja28/Tempest,cloudbase/lis-tempest,bigswitch/tempest,danielmellado/tempest,varunarya10/tempest,manasi24/tempest,Tesora/tesora-tempest,manasi24/jiocloud-tempest-qatempest,akash1808/tempest,flyingfish007/tempest,akash1808/tempest,rakeshmi/tempest,afaheem88/tempest,vedujoshi/tempest,openstack/tempest,NexusIS/tempest,Juniper/tempest,nunogt/tempest,hayderimran7/tempest,afaheem88/tempest_neutron,Juniper/tempest,ebagdasa/tempest,alinbalutoiu/tempest,izadorozhna/tempest,roopali8/tempest,Vaidyanath/tempest,queria/my-tempest,dkalashnik/tempest,pczerkas/tempest,LIS/lis-tempest,Juraci/tempest,Lilywei123/tempest,tonyli71/tempest,masayukig/tempest,tudorvio/tempest,eggmaster/tempest,hpcloud-mon/tempest,manasi24/jiocloud-tempest-qatempest,ebagdasa/tempest,xbezdick/tempest,rzarzynski/tempest,yamt/tempest,roopali8/tempest,sebrandon1/tempest,Mirantis/tempest,dkalashnik/tempest,sebrandon1/tempest,hpcloud-mon/tempest,cloudbase/lis-tempest,zsoltdudas/lis-tempest,LIS/lis-tempest,Mirantis/tempest,jamielennox/tempest,alinbalutoiu/tempest,redhat-cip/tempest,NexusIS/tempest,rzarzynski/tempest,FujitsuEnablingSoftwareTechnologyGmbH/tempest,CiscoSystems/tempest,openstack/tempest,danielmellado/tempest,jamielennox/tempest,JioCloud/tempest,nunogt/tempest,rakeshmi/tempest,manasi24/tempest,afaheem88/tempest_neutron,cisco-openstack/tempest,izadorozhna/tempest,tudorvio/tempest,JioCloud/tempest,bigswitch/tempest,tonyli71/tempest,pandeyop/tempest,vedujoshi/tempest