Removed inaccurate documentation
Removed inaccurate documentation

The basic user_variables.yml file was referencing a variable that no longer
exists. As such, it has been removed.

Change-Id: I11bfd8d9af0b94a57a49043cc595a13addd4c986

manuelfelipe/openstack-ansible,jpmontez/openstack-ansible,cfarquhar/openstack-ansible,weezer/openstack-ansible,openstack/openstack-ansible,pombredanne/os-ansible-deployment,open-switch/infra_openstack-ansible,BjoernT/os-ansible-deployment,BjoernT/os-ansible-deployment,os-cloud/os-ansible-deployment,git-harry/os-ansible-deployment,mrda/openstack-ansible,git-harry/os-ansible-deployment,major/os-ansible-deployment,antonym/openstack-ansible,manuelfelipe/openstack-ansible,mrda/openstack-ansible,jpmontez/openstack-ansible,jpmontez/os-ansible-deployment,pombredanne/os-ansible-deployment,cloudnull/os-ansible-deployment,git-harry/os-ansible-deployment,openstack/openstack-ansible,yanyao/openstack-deployment-liberty,weezer/openstack-ansible,cfarquhar/openstack-ansible,dhanunjaya/os-ansible-deployment,antonym/openstack-ansible,achekunov/openstack-ansible,bunchc/openstack-ansible,cloudnull/os-ansible-deployment,AlphaStaxLLC/os-ansible-deployment,mancdaz/openstack-ansible,robb-romans/openstack-ansible,Logan2211/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,yanyao/newton,sti-jans/openstack-ansible,yanyao/openstack-deployment-liberty,major/openstack-ansible,achekunov/openstack-ansible,major/openstack-ansible,antonym/openstack-ansible,shane-c/openstack-ansible,Logan2211/openstack-ansible,mrda/openstack-ansible,dhanunjaya/os-ansible-deployment,sti-jans/openstack-ansible,stackforge/os-ansible-deployment,jpmontez/os-ansible-deployment,major/os-ansible-deployment,sti-jans/openstack-ansible,yanyao/openstack-ansible,AlphaStaxLLC/os-ansible-deployment,stackforge/os-ansible-deployment,yanyao/newton,BjoernT/os-ansible-deployment,open-switch/infra_openstack-ansible,achekunov/openstack-ansible,shane-c/openstack-ansible,shane-c/openstack-ansible,bunchc/openstack-ansible,open-switch/infra_openstack-ansible,yanyao/openstack-deployment-liberty,jpmontez/openstack-ansible,BjoernT/openstack-ansible,jpmontez/os-ansible-deployment,os-cloud/os-ansible-deployment,robb-romans/openstack-ansible,mancdaz/openstack-ansible,yanyao/openstack-ansible,manuelfelipe/openstack-ansible,BjoernT/openstack-ansible,pombredanne/os-ansible-deployment