delete unsupported rancher/openstack

foo

terraform/modules/compute/openstack/data.tf

terraform/modules/compute/openstack/network.tf

terraform/modules/compute/openstack/nodes.tf

terraform/modules/compute/openstack/outputs.tf

terraform/modules/compute/openstack/providers.tf

terraform/modules/compute/openstack/security_group.tf

...m/modules/compute/openstack/templates/agent_userdata.tmpl

.../modules/compute/openstack/templates/server_userdata.tmpl

terraform/modules/compute/openstack/variables.tf

terraform/modules/compute/openstack/versions.tf

terraform/modules/rancher/main.tf

terraform/modules/rancher/outputs.tf

terraform/modules/rancher/providers.tf

terraform/modules/rancher/variables.tf

terraform/modules/rancher/versions.tf