CI: remove qemu-utils installation

nova-libvirt images now include qemu-utils on master [1] and xena [2].

[1] https://review.opendev.org/c/openstack/kolla/+/830401
[2] https://review.opendev.org/c/openstack/kolla/+/831411

Change-Id: I8f5f93340642d055cce7ef306d942e75b10c86a9

playbooks/kayobe-overcloud-base/run.yml

@@ -9,11 +9,6 @@
         cmd: "{{ kayobe_src_dir }}/dev/overcloud-deploy.sh &> {{ logs_dir }}/ansible/overcloud-deploy"
         executable: /bin/bash
 
-    - name: Ensure qemu-img is available for Tenks
-      command: docker exec -u root nova_libvirt bash -c 'apt update && apt -y install qemu-utils'
-      become: true
-      when: ansible_os_family == 'Debian'
-
     - name: Ensure test Tenks cluster is deployed
       shell:
         # Pass absolute source directory, since otherwise the `chdir` will

playbooks/kayobe-overcloud-upgrade-base/run.yml

@@ -29,11 +29,6 @@
       environment:
         KAYOBE_CONFIG_SOURCE_PATH: "{{ previous_kayobe_config_src_dir }}"
 
-    - name: Ensure qemu-img is available for Tenks
-      command: docker exec -u root nova_libvirt bash -c 'apt update && apt -y install qemu-utils'
-      become: true
-      when: ansible_os_family == 'Debian'
-
     # Update the Kayobe configuration to the current release.
 
     - name: Ensure kolla config directory exists