Remove config for shared BitBucket dev app

Bitbucket does not offer scopes, just full access to public and private repos for any app authorized to act on behalf of the user. We should revoke permissions on the app ASAP (if not done), and alert those who may have been effected. Unfortunately, it might be hard to do that if we've already deleted the app, but we should get in touch with BitBucket to find the users who we may have exposed to danger.