Removing roles from supplier users

Summary:

Hello Community. We are deprovisioning a role from our current supplier users and preventing it from being assigned by default to new supplier users . We followed following steps, yet the supplier can check it during self-registration.

1. Deprovisioned role by editing the role>removing all existing users
2. Unchecked the role in Manage supplier user role set up
3. Removed the role from OCI set up.

How can we remove the option from supplier registration page.

Thanks.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):