Remove Python 3.3 from list of tox environments
Remove Python 3.3 from list of tox environments

Remove Python 3.3 from the list of tox test environments since we do
not currently support Python 3.3 for swift.

Change-Id: I7993a511e8433b21b292f21f4775e4ef2b5c2539

psachin/swift,smerritt/swift,tipabu/swift,Khushbu27/Tutorial,openstack/swift,redbo/swift,nadeemsyed/swift,openstack/swift,zackmdavis/swift,openstack/swift,notmyname/swift,anishnarang/gswift,williamthegrey/swift,swiftstack/swift,sarvesh-ranjan/swift,revoer/keystone-8.0.0,IPVL/swift-kilo,bkolli/swift,openstack/swift,bradleypj823/swift,levythu/swift,maginatics/swift,hurricanerix/swift,xiaoguoai/ec-dev-swift,bkolli/swift,clayg/swift,Akanoa/swift,eatbyte/Swift,AfonsoFGarcia/swift,smerritt/swift,clayg/swift,wenhuizhang/swift,maginatics/swift,prashanthpai/swift,aerwin3/swift,nadeemsyed/swift,NeCTAR-RC/swift,mjzmjz/swift,swiftstack/swift,hbhdytf/mac2,mjzmjz/swift,IPVL/swift-kilo,shibaniahegde/OpenStak_swift,hbhdytf/mac2,mjwtom/swift,AfonsoFGarcia/swift,NeCTAR-RC/swift,larsbutler/swift,notmyname/swift,bouncestorage/swift,redhat-openstack/swift,bradleypj823/swift,takeshineshiro/swift,swiftstack/swift,psachin/swift,dpgoetz/swift,matthewoliver/swift,Khushbu27/Tutorial,rackerlabs/swift,daasbank/swift,clayg/swift,matthewoliver/swift,bouncestorage/swift,psachin/swift,hurricanerix/swift,prashanthpai/swift,thiagodasilva/swift,psachin/swift,aerwin3/swift,xiaoguoai/ec-dev-swift,nadeemsyed/swift,hbhdytf/mac,williamthegrey/swift,scality/ScalitySproxydSwift,dencaval/swift,Em-Pan/swift,tipabu/swift,Akanoa/swift,revoer/keystone-8.0.0,scality/ScalitySproxydSwift,clayg/swift,notmyname/swift,dpgoetz/swift,sarvesh-ranjan/swift,hurricanerix/swift,tipabu/swift,anishnarang/gswift,hurricanerix/swift,matthewoliver/swift,takeshineshiro/swift,Seagate/swift,smerritt/swift,rackerlabs/swift,gold3bear/swift,Em-Pan/swift,zackmdavis/swift,eatbyte/Swift,smerritt/swift,thiagodasilva/swift,Seagate/swift,daasbank/swift,larsbutler/swift,mjwtom/swift,iostackproject/IO-Bandwidth-Differentiation,hbhdytf/mac,iostackproject/IO-Bandwidth-Differentiation,redhat-openstack/swift,shibaniahegde/OpenStak_swift,hbhdytf/mac2,gold3bear/swift,notmyname/swift,levythu/swift,tipabu/swift,nadeemsyed/swift,hbhdytf/mac2,redbo/swift,dencaval/swift,matthewoliver/swift,wenhuizhang/swift