Remove unused variables
Remove unused variables

fetch() no longer returns metadata so fetch_to_raw does not need to pass it.
Callers don't expect the return value either.

Output of execute() is not used for anything

Change-Id: I84be22e042696a51eb919f6c6f0ccf58aaf3ace3

sridevikoushik31/nova,akash1808/nova,ntt-sic/nova,mahak/nova,belmiromoreira/nova,barnsnake351/nova,alaski/nova,yrobla/nova,mandeepdhami/nova,NeCTAR-RC/nova,NewpTone/stacklab-nova,tudorvio/nova,zaina/nova,rickerc/nova_audit,devendermishrajio/nova,yrobla/nova,Yuriy-Leonov/nova,rahulunair/nova,Juniper/nova,mgagne/nova,blueboxgroup/nova,yosshy/nova,CloudServer/nova,bgxavier/nova,felixma/nova,cloudbase/nova-virtualbox,dstroppa/openstack-smartos-nova-grizzly,joker946/nova,imsplitbit/nova,gspilio/nova,devendermishrajio/nova_test_latest,TieWei/nova,noironetworks/nova,hanlind/nova,dims/nova,akash1808/nova,sridevikoushik31/nova,CEG-FYP-OpenStack/scheduler,Triv90/Nova,shail2810/nova,felixma/nova,belmiromoreira/nova,DirectXMan12/nova-hacking,Stavitsky/nova,openstack/nova,mikalstill/nova,gooddata/openstack-nova,vladikr/nova_drafts,houshengbo/nova_vmware_compute_driver,iuliat/nova,LoHChina/nova,fajoy/nova,alvarolopez/nova,dstroppa/openstack-smartos-nova-grizzly,NoBodyCam/TftpPxeBootBareMetal,fnordahl/nova,petrutlucian94/nova,dims/nova,Yusuke1987/openstack_template,TieWei/nova,rahulunair/nova,tangfeixiong/nova,isyippee/nova,NoBodyCam/TftpPxeBootBareMetal,double12gzh/nova,dstroppa/openstack-smartos-nova-grizzly,Francis-Liu/animated-broccoli,savi-dev/nova,citrix-openstack-build/nova,vladikr/nova_drafts,JioCloud/nova,cloudbau/nova,maoy/zknova,yrobla/nova,phenoxim/nova,BeyondTheClouds/nova,mikalstill/nova,eharney/nova,JioCloud/nova,CiscoSystems/nova,plumgrid/plumgrid-nova,CEG-FYP-OpenStack/scheduler,TwinkleChawla/nova,klmitch/nova,mgagne/nova,vmturbo/nova,BeyondTheClouds/nova,gooddata/openstack-nova,zhimin711/nova,plumgrid/plumgrid-nova,CloudServer/nova,takeshineshiro/nova,j-carpentier/nova,NoBodyCam/TftpPxeBootBareMetal,leilihh/novaha,OpenAcademy-OpenStack/nova-scheduler,sridevikoushik31/nova,kimjaejoong/nova,tudorvio/nova,cyx1231st/nova,sridevikoushik31/nova,angdraug/nova,eayunstack/nova,virtualopensystems/nova,zzicewind/nova,DirectXMan12/nova-hacking,edulramirez/nova,shootstar/novatest,spring-week-topos/nova-week,adelina-t/nova,JioCloud/nova_test_latest,CCI-MOC/nova,petrutlucian94/nova,LoHChina/nova,leilihh/novaha,aristanetworks/arista-ovs-nova,paulmathews/nova,leilihh/nova,Yusuke1987/openstack_template,rrader/nova-docker-plugin,iuliat/nova,Francis-Liu/animated-broccoli,mahak/nova,akash1808/nova_test_latest,ewindisch/nova,dawnpower/nova,bigswitch/nova,mandeepdhami/nova,gooddata/openstack-nova,CiscoSystems/nova,takeshineshiro/nova,watonyweng/nova,mmnelemane/nova,Juniper/nova,fajoy/nova,adelina-t/nova,bclau/nova,qwefi/nova,varunarya10/nova_test_latest,Juniper/nova,tianweizhang/nova,kimjaejoong/nova,NeCTAR-RC/nova,petrutlucian94/nova_dev,yosshy/nova,cloudbase/nova,isyippee/nova,yatinkumbhare/openstack-nova,orbitfp7/nova,silenceli/nova,petrutlucian94/nova_dev,rajalokan/nova,MountainWei/nova,rajalokan/nova,ewindisch/nova,saleemjaveds/https-github.com-openstack-nova,tanglei528/nova,hanlind/nova,sacharya/nova,silenceli/nova,tianweizhang/nova,zhimin711/nova,bclau/nova,alexandrucoman/vbox-nova-driver,spring-week-topos/nova-week,openstack/nova,nikesh-mahalka/nova,OpenAcademy-OpenStack/nova-scheduler,cyx1231st/nova,nikesh-mahalka/nova,jianghuaw/nova,gspilio/nova,devendermishrajio/nova_test_latest,jeffrey4l/nova,aristanetworks/arista-ovs-nova,paulmathews/nova,cernops/nova,joker946/nova,eharney/nova,usc-isi/nova,dawnpower/nova,redhat-openstack/nova,maheshp/novatest,luogangyi/bcec-nova,thomasem/nova,imsplitbit/nova,vmturbo/nova,sridevikoushik31/openstack,blueboxgroup/nova,yatinkumbhare/openstack-nova,gspilio/nova,Brocade-OpenSource/OpenStack-DNRM-Nova,Triv90/Nova,jeffrey4l/nova,SUSE-Cloud/nova,varunarya10/nova_test_latest,badock/nova,jianghuaw/nova,cloudbase/nova,Metaswitch/calico-nova,openstack/nova,JianyuWang/nova,shahar-stratoscale/nova,fajoy/nova,ruslanloman/nova,rickerc/nova_audit,Yuriy-Leonov/nova,eonpatapon/nova,apporc/nova,phenoxim/nova,maelnor/nova,projectcalico/calico-nova,Stavitsky/nova,JioCloud/nova_test_latest,scripnichenko/nova,ted-gould/nova,shahar-stratoscale/nova,aristanetworks/arista-ovs-nova,bigswitch/nova,raildo/nova,alvarolopez/nova,maheshp/novatest,affo/nova,gooddata/openstack-nova,houshengbo/nova_vmware_compute_driver,bgxavier/nova,maheshp/novatest,MountainWei/nova,Brocade-OpenSource/OpenStack-DNRM-Nova,affo/nova,sebrandon1/nova,sacharya/nova,cloudbase/nova,redhat-openstack/nova,saleemjaveds/https-github.com-openstack-nova,tealover/nova,rrader/nova-docker-plugin,eonpatapon/nova,BeyondTheClouds/nova,zzicewind/nova,devoid/nova,watonyweng/nova,scripnichenko/nova,orbitfp7/nova,Tehsmash/nova,Juniper/nova,whitepages/nova,tealover/nova,viggates/nova,cernops/nova,Metaswitch/calico-nova,double12gzh/nova,j-carpentier/nova,viggates/nova,sridevikoushik31/openstack,luogangyi/bcec-nova,sridevikoushik31/openstack,jianghuaw/nova,sebrandon1/nova,raildo/nova,zaina/nova,eayunstack/nova,projectcalico/calico-nova,mmnelemane/nova,alaski/nova,berrange/nova,maelnor/nova,citrix-openstack-build/nova,alexandrucoman/vbox-nova-driver,apporc/n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