Remove mention of nova-manage.conf from nova-manage.rst
Remove mention of nova-manage.conf from nova-manage.rst

As of commit 07ee9639 three years ago nova-manage.conf is no longer
used, so let's clean up the man page.

Closes-Bug: #1304580

Change-Id: Ie061733da4bd0337f510e17b6dd7ca5bae14b7de

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