J-BusinessDirectory - Remove discount code

Hi,I want to remove the discount option (button and field ) completely from my registration form.Could not find an option for this in the admin panel so i guess i have to remove it from a the file. Can you please tell me in wich file i can do this?

Hi,

The file is located on {joomla}/components/com_jbusienssdirectory/views/payment/tmpl/default.php