Comment 2 for bug 1247743

the code removed in the above test was:

# def backup_volume(self, context, backup, backup_service):
# """Create a new backup from an existing volume."""
# raise NotImplementedError()

# def restore_backup(self, context, backup, volume, backup_service):
# """Restore an existing backup to a new or existing volume."""
# raise NotImplementedError()