[debian] buster cleanup

roles/baie/tasks/main.yml

 ---
-- name: Configure Debian backports repository
-  template:
-    src: apt/sources.list.d/backports.list.j2
-    dest: /etc/apt/sources.list.d/backports.list
-
 - name: Install ZFS
   apt:
     update_cache: true
-    default_release: "{{ ansible_lsb.codename }}-backports"
     name:
       - zfs-dkms
       - zfsutils-linux