matrix-backup-borg - cleanup the .service from the systemd list

roles/matrix-backup-borg/tasks/init.yml

@@ -1,4 +1,4 @@
 ---
 - set_fact:
-    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-backup-borg.service', 'matrix-backup-borg.timer'] }}"
+    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-backup-borg.timer'] }}"
   when: matrix_backup_borg_enabled|bool