Remove calico driver reference

Calico driver support has been removed from OpenStack-Ansible
starting in Antelope release [1]. We clean-up nove role to drop calico
support from it as well.

[1] https://review.opendev.org/c/openstack/openstack-ansible/+/866119

Change-Id: Ie9c118b8bab265e5bf06b6ec05731cd673ee4d95

defaults/main.yml

@@ -319,9 +319,6 @@ nova_network_services:
     use_forwarded_for: True
     metadata_proxy_enabled: True
     ovs_bridge: alubr0
-  calico:
-    use_forwarded_for: True
-    metadata_proxy_enabled: False
   nsx:
     use_forwarded_for: True
     metadata_proxy_enabled: True

tasks/drivers/kvm/nova_compute_kvm.yml

@@ -86,7 +86,6 @@
     mode: "0600"
   when:
     - _nova_qemu_conf | length > 0
-      or nova_network_type == 'calico'
   notify: Restart libvirt-bin
   tags:
     - nova-config

templates/qemu.conf.j2

@@ -1,20 +1,5 @@
 # {{ ansible_managed }}
 
-{% if nova_network_type == 'calico' %}
-# Calico specific qemu settings
-# Information available at:
-# http://docs.projectcalico.org/en/latest/ubuntu-opens-install.html
-clear_emulator_capabilities = 0
-user = "root"
-group = "root"
-cgroup_device_acl = [
-     "/dev/null", "/dev/full", "/dev/zero",
-     "/dev/random", "/dev/urandom",
-     "/dev/ptmx", "/dev/kvm", "/dev/kqemu",
-     "/dev/rtc", "/dev/hpet", "/dev/net/tun",
-]
-{% endif %}
-
 {% if nova_libvirtd_listen_tls == 1 %}
 # Use of TLS requires that x509 certificates be issued. The default is
 # to keep them in /etc/pki/qemu. This directory must contain