# File lib/friendly_id/active_record2/tasks.rb, line 49
    def delete_old_slugs
      conditions = ["created_at < ?", DateTime.now - days.days]
      if klass
        conditions[0] << " AND sluggable_type = ?"
        conditions << klass.to_s
      end
      Slug.all(:conditions => conditions).select(&:outdated?).map(&:destroy)
    end