The revenant blade already doesn't use mounted combat in any way. None of the prerequisites to the PrC have anything to do with mounted combat and none of the special abilities it gains are focused on mounted combat either. Even the Ancestral Guidance ability, which provides access to a number of feats, doesn't list any mounted combat feat. At most you can describe the improvement of ranger animal companion as a nod in that direction if the PC is a ranger whose animal companion is his mount.
In short, you can use the PrC exactly as written and not use mounted combat in any way.