Removing unnecessary payment gateways
From GroupScript documentation
If you are using version 2.7 or below, you can only disable payment gateways by deleting the corresponding file in system/application/payment_backends
- paypal_dp.php - PayPal Website Payments Pro (PayPal with credit cards)
- paypal_ec.php - PayPal Express Checkout (PayPal with regular PayPal accounts)
- authorize_aim.php - Authorize.net payments
- credits_backend.php - Payments with in-site credits system.
If you are using 3.0 or newer, payment gateways can be disabled from site settings. Go to Backend->Settings->Payment Options->Payment Global tab.