ldap_server: Migrate to use backup_base

roles/ldap_server/meta/main.yml

@@ -1,5 +1,6 @@
 ---
 dependencies:
+  - {role: backup_base}
   - {role: kerberos}
   - {role: ldap}
   - {role: saslauthd}

roles/ldap_server/tasks/main.yml

@@ -55,28 +55,6 @@
     follow: false
   when: ldap_datadir != "/srv/ldap"
 
-- name: Import sftpuser role
-  ansible.builtin.import_role:
-    name: sftpuser
-
-- name: Create backup directory
-  ansible.builtin.file:
-    path: "{{ ldap_backupdir }}"
-    state: directory
-    mode: "0750"
-    owner: root
-    group: backup
-
-- name: Link backup directory
-  ansible.builtin.file:
-    path: /srv/backup
-    src: /export/backup
-    state: link
-    owner: root
-    group: "{{ ansible_wheel }}"
-    follow: false
-  when: ldap_backupdir != "/srv/backup"
-
 - name: Copy backup script
   ansible.builtin.copy:
     dest: /usr/local/sbin/ldap-backup