Tank Auth. How to remove Captcha (but completely remove it...)

[eluser]chefnelone[/eluser]
Hello

Just this: How to remove Captcha. But completely remove it. I set it in the config/tank_auth.php

Code:

$config['login_max_attempts'] = 100000;

$config['captcha_registration'] = false; // BUT THIS ONLY AFFECT THE REGISTRATION, NOT THE LOGIN

What else do I need to do? I already spent hours in this..
please help.