docs: Drop ADO references from configuration.md
What does this Merge Request do?
Support for these was dropped with !1715 (merged) and the docs were missed.
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.