Blacklist_email_on_bounce

Hi,
I have set up automatic bounce with defined rules, using a command line cron job, that seem to be working.
I have the following code in my config file:

define (“MANUALLY_PROCESS_BOUNCES”,0);
define(‘BLACKLIST_EMAIL_ON_BOUNCE’, 1);
define(‘USE_ADVANCED_BOUNCEHANDLING’, 1);

As I understand, the $bounce_unsubscribe_threshold is now ignored.
My questionis:
Is “define(‘BLACKLIST_EMAIL_ON_BOUNCE’, 1);” needed or is it to ignored? Is it best to delete it or change it’s value?

Thank you for a response.