I'm pretty sure the answer to this is no, but I want to make sure.
I'm interested in making a cleric 7/Holy Vindicator 5. One of the pre-reqs for HV is having either Alignment Channel or Elemental Channel. Can I, after taking the levels of HV, retrain out of the feat?
From the Feat section of the retraining rules in U Campaign: "The old feat can't be one you used as a prerequisite for a feat, class feature, archetype, prestige class, or other ability."