Remove explicit distribute depend.
Remove explicit distribute depend.

Causes issues with the recent re-merge with setuptools. Advice from
upstream is to stop doing explicit depends.

Change-Id: I729ed2f646aa514fbb7b7dfc4a070df2f7b27ff4

mat128/python-novaclient,metacloud/python-novaclient,Shihta/python-novaclient,akash1808/python-novaclient,Shihta/python-novaclient,mat128/python-novaclient,CCI-MOC/python-novaclient,metacloud/python-novaclient,takeshineshiro/python-novaclient,guptaankita/python-novaclient,JioCloud/python-novaclient,citrix-openstack-build/python-novaclient,takeshineshiro/python-novaclient,akash1808/python-novaclient,guptaankita/python-novaclient,ntt-sic/python-novaclient,citrix-openstack-build/python-novaclient,CCI-MOC/python-novaclient,ntt-sic/python-novaclient,JioCloud/python-novaclient