Veers was to play a major role in ROTJ so I think George and the gang might have had a rethink when they were brainstorming for ideas for the next film.
Veers was to be ordered to deliver Luke to Vader but Jejerrod (a Grand Moff and rival to Vader, a role that would become the inspiration for Xizor in Shadows Of The Empire) countermands the order and sends him to the Emperor instead. Vader chokes Jejerrod to death in response.