Remove bok-choy usage about credentials

[dianakhuang]

This removal may be blocked on the work to move the frontend code in credentials into an MFE.

We may also want to evaluate the existing credentials tests to see if we even feel like these bok choy tests are useful. We decided that they were not for edx-platform.

We should also evaluate whether or not they are being run during credentials CI.

[feanil]

@hurtstotouchfire can you help schedule this work, no rush but it just needs to get done.

[feanil]

@hurtstotouchfire FYI, we're planning on archiving the bok-choy repo in the next month. It will not receive any further updates after that including security updates. If your acceptance tests are still valuable, we strongly recommend moving them to a different testing framework.

[hurtstotouchfire]

Thanks @feanil, adding this to our triage queue.

[jsnwesson]

A Jira ticket was created to address this and we'll be bringing this up in our next grooming session.

[jsnwesson]

Update: this task is now prioritized and should hopefully be worked on in the upcoming weeks.