Don't dump ? methods to config

What does this Merge Request do?

These methods are only added for convenience, and
always have a non-? equivalent.

Merge Request checklist

• Tests added for new functionality. If not, please raise Issue to follow-up.
• This change is backward compatible. If not, please include steps to communicate to our users.
• [-] Documentation added/updated, if needed.
• [-] gdk doctor test added, if needed.