matrix-backup-borg: cleanup comments

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

@@ -7,9 +7,6 @@
   with_items:
     - "matrix_backup_borg_ssh_key_private"
     - "matrix_backup_borg_location_repositories"
-#    - "matrix_backup_borg_storage_encryption_passphrase"
-#      when: "matrix_backup_borg_unknown_unencrypted_repo_access_is_ok == false"
-#    - "matrix_backup_borg_storage_encryption_passphrase"
 
 - name: Fail if encryption passphrase is undefined unless repository is unencrypted
   fail: