Remove unused code in swift/obj/server.py
Remove unused code in swift/obj/server.py

keep_cache was defined twice

Change-Id: I5f775f618669e3dabfc3bc54dd7bd2cd7f00b2f0

shibaniahegde/OpenStak_swift,swiftstack/swift,bkolli/swift,larsbutler/swift,matthewoliver/swift,tipabu/swift,redhat-openstack/swift,psachin/swift,openstack/swift,matthewoliver/swift,aerwin3/swift,notmyname/swift,tipabu/swift,hbhdytf/mac2,tipabu/swift,Akanoa/swift,aerwin3/swift,swiftstack/swift,mjwtom/swift,bouncestorage/swift,redbo/swift,dencaval/swift,nadeemsyed/swift,notmyname/swift,hbhdytf/mac,Em-Pan/swift,nadeemsyed/swift,notmyname/swift,redbo/swift,bradleypj823/swift,gold3bear/swift,bkolli/swift,psachin/swift,openstack/swift,swiftstack/swift,Em-Pan/swift,thiagodasilva/swift,clayg/swift,daasbank/swift,openstack/swift,smerritt/swift,thiagodasilva/swift,hurricanerix/swift,hbhdytf/mac2,nadeemsyed/swift,prashanthpai/swift,williamthegrey/swift,openstack/swift,hurricanerix/swift,clayg/swift,williamthegrey/swift,hbhdytf/mac2,smerritt/swift,rackerlabs/swift,clayg/swift,Akanoa/swift,takeshineshiro/swift,dencaval/swift,hurricanerix/swift,hbhdytf/mac,nadeemsyed/swift,hbhdytf/mac2,tipabu/swift,mjzmjz/swift,takeshineshiro/swift,gold3bear/swift,smerritt/swift,mjwtom/swift,mjzmjz/swift,bouncestorage/swift,larsbutler/swift,notmyname/swift,levythu/swift,smerritt/swift,daasbank/swift,revoer/keystone-8.0.0,psachin/swift,revoer/keystone-8.0.0,prashanthpai/swift,psachin/swift,hurricanerix/swift,levythu/swift,bradleypj823/swift,rackerlabs/swift,matthewoliver/swift,shibaniahegde/OpenStak_swift,redhat-openstack/swift,matthewoliver/swift,clayg/swift