Docs: Removing redundant config README
Docs: Removing redundant config README

Given that this doc is not part of the install or dev
guides and that nearly all of its content is already present
in those guides, we should remove this and focus our
maintenance effort on the more widely used documentation.

Change-Id: I7d68ceef8e44da3ecc8e13729db4787eb835be82

cloudnull/os-ansible-deployment,cfarquhar/openstack-ansible,BjoernT/openstack-ansible,BjoernT/os-ansible-deployment,major/openstack-ansible,cfarquhar/openstack-ansible,Logan2211/openstack-ansible,BjoernT/os-ansible-deployment,robb-romans/openstack-ansible,Logan2211/openstack-ansible,yanyao/openstack-ansible,yanyao/newton,robb-romans/openstack-ansible,openstack/openstack-ansible,major/os-ansible-deployment,openstack/openstack-ansible,bunchc/openstack-ansible,weezer/openstack-ansible,BjoernT/openstack-ansible,os-cloud/os-ansible-deployment,mrda/openstack-ansible,mrda/openstack-ansible,mancdaz/openstack-ansible,bunchc/openstack-ansible,stackforge/os-ansible-deployment,BjoernT/os-ansible-deployment,cloudnull/os-ansible-deployment,mrda/openstack-ansible,os-cloud/os-ansible-deployment,yanyao/openstack-ansible,major/openstack-ansible,stackforge/os-ansible-deployment,mancdaz/openstack-ansible,weezer/openstack-ansible,yanyao/newton,major/os-ansible-deployment