Removed unused instance object helper function
Removed unused instance object helper function

Remove code that is no longer used

Change-Id: Iaf99824ad28aa03206a997e69d9f6097ba034941

openstack/nova,ted-gould/nova,eayunstack/nova,Metaswitch/calico-nova,jianghuaw/nova,petrutlucian94/nova,mgagne/nova,ted-gould/nova,alexandrucoman/vbox-nova-driver,klmitch/nova,JioCloud/nova_test_latest,mikalstill/nova,bgxavier/nova,petrutlucian94/nova,isyippee/nova,silenceli/nova,blueboxgroup/nova,redhat-openstack/nova,vmturbo/nova,joker946/nova,Tehsmash/nova,tudorvio/nova,eonpatapon/nova,jianghuaw/nova,devendermishrajio/nova_test_latest,akash1808/nova,rajalokan/nova,leilihh/novaha,mmnelemane/nova,adelina-t/nova,devoid/nova,apporc/nova,hanlind/nova,cloudbase/nova,zhimin711/nova,luogangyi/bcec-nova,Juniper/nova,ewindisch/nova,zaina/nova,watonyweng/nova,sacharya/nova,alvarolopez/nova,felixma/nova,gooddata/openstack-nova,leilihh/novaha,noironetworks/nova,sacharya/nova,hanlind/nova,alaski/nova,tanglei528/nova,devendermishrajio/nova_test_latest,vladikr/nova_drafts,mgagne/nova,rrader/nova-docker-plugin,klmitch/nova,TwinkleChawla/nova,CEG-FYP-OpenStack/scheduler,projectcalico/calico-nova,jeffrey4l/nova,MountainWei/nova,blueboxgroup/nova,affo/nova,mikalstill/nova,JianyuWang/nova,Yusuke1987/openstack_template,yatinkumbhare/openstack-nova,akash1808/nova_test_latest,edulramirez/nova,virtualopensystems/nova,gooddata/openstack-nova,cernops/nova,BeyondTheClouds/nova,JioCloud/nova_test_latest,raildo/nova,MountainWei/nova,dawnpower/nova,sebrandon1/nova,CEG-FYP-OpenStack/scheduler,leilihh/nova,CloudServer/nova,eharney/nova,shail2810/nova,iuliat/nova,klmitch/nova,jianghuaw/nova,tudorvio/nova,alexandrucoman/vbox-nova-driver,virtualopensystems/nova,zzicewind/nova,silenceli/nova,openstack/nova,badock/nova,angdraug/nova,mmnelemane/nova,klmitch/nova,luogangyi/bcec-nova,kimjaejoong/nova,shahar-stratoscale/nova,maelnor/nova,Francis-Liu/animated-broccoli,alaski/nova,shail2810/nova,Juniper/nova,orbitfp7/nova,bigswitch/nova,affo/nova,thomasem/nova,JianyuWang/nova,leilihh/nova,whitepages/nova,varunarya10/nova_test_latest,cloudbase/nova-virtualbox,dawnpower/nova,projectcalico/calico-nova,cernops/nova,whitepages/nova,rahulunair/nova,bgxavier/nova,thomasem/nova,petrutlucian94/nova_dev,raildo/nova,ruslanloman/nova,rahulunair/nova,adelina-t/nova,takeshineshiro/nova,nikesh-mahalka/nova,eayunstack/nova,iuliat/nova,rajalokan/nova,kimjaejoong/nova,mahak/nova,JioCloud/nova,fnordahl/nova,varunarya10/nova_test_latest,rajalokan/nova,ruslanloman/nova,zaina/nova,tealover/nova,saleemjaveds/https-github.com-openstack-nova,CCI-MOC/nova,BeyondTheClouds/nova,rrader/nova-docker-plugin,rajalokan/nova,Stavitsky/nova,mandeepdhami/nova,zzicewind/nova,dims/nova,maelnor/nova,cernops/nova,double12gzh/nova,vmturbo/nova,ewindisch/nova,NeCTAR-RC/nova,edulramirez/nova,scripnichenko/nova,eonpatapon/nova,CiscoSystems/nova,cyx1231st/nova,tealover/nova,apporc/nova,akash1808/nova_test_latest,scripnichenko/nova,gooddata/openstack-nova,CCI-MOC/nova,cloudbase/nova,badock/nova,CiscoSystems/nova,j-carpentier/nova,berrange/nova,j-carpentier/nova,redhat-openstack/nova,double12gzh/nova,tangfeixiong/nova,dims/nova,berrange/nova,mahak/nova,nikesh-mahalka/nova,barnsnake351/nova,alvarolopez/nova,tangfeixiong/nova,cloudbase/nova,devendermishrajio/nova,yosshy/nova,jianghuaw/nova,akash1808/nova,OpenAcademy-OpenStack/nova-scheduler,noironetworks/nova,mahak/nova,vmturbo/nova,yatinkumbhare/openstack-nova,JioCloud/nova,LoHChina/nova,saleemjaveds/https-github.com-openstack-nova,rahulunair/nova,barnsnake351/nova,viggates/nova,angdraug/nova,joker946/nova,TwinkleChawla/nova,sebrandon1/nova,gooddata/openstack-nova,vmturbo/nova,isyippee/nova,tanglei528/nova,petrutlucian94/nova_dev,BeyondTheClouds/nova,vladikr/nova_drafts,Francis-Liu/animated-broccoli,devoid/nova,phenoxim/nova,Juniper/nova,devendermishrajio/nova,sebrandon1/nova,belmiromoreira/nova,tianweizhang/nova,cyx1231st/nova,fnordahl/nova,mandeepdhami/nova,CloudServer/nova,phenoxim/nova,OpenAcademy-OpenStack/nova-scheduler,Juniper/nova,bigswitch/nova,felixma/nova,mikalstill/nova,zhimin711/nova,orbitfp7/nova,shahar-stratoscale/nova,watonyweng/nova,jeffrey4l/nova,Metaswitch/calico-nova,takeshineshiro/nova,LoHChina/nova,hanlind/nova,spring-week-topos/nova-week,Yusuke1987/openstack_template,Tehsmash/nova,viggates/nova,openstack/nova,tianweizhang/nova,Stavitsky/nova,NeCTAR-RC/nova,cloudbase/nova-virtualbox,eharney/nova,yosshy/nova,spring-week-topos/nova-week,belmiromoreira/nova