Spatie\Backup\Tasks\Cleanup\Strategies\DefaultStrategy::removeBackupsOlderThan PHP Method

    protected function removeBackupsOlderThan(Carbon $endDate, BackupCollection $backups)
    {
        $backups->filter(function (Backup $backup) use($endDate) {
            return $backup->exists() && $backup->date()->lt($endDate);
        })->each(function (Backup $backup) {
            $backup->delete();
        });
    }