🔧 [#4246] Remove removed authentication backend from 2FA bypass

This backed became obsolete, so it shouldn't be in this setting.
The system check didn't report it in dev mode because the default
there is to disable 2FA entirely.

src/openforms/conf/base.py

@@ -701,7 +701,6 @@
 # auth, avoiding having some set up MFA again in the project.
 MAYKIN_2FA_ALLOW_MFA_BYPASS_BACKENDS = [
     "mozilla_django_oidc_db.backends.OIDCAuthenticationBackend",
-    "openforms.authentication.contrib.org_oidc.backends.OIDCAuthenticationBackend",
 ]
 
 #