Well you make a good point. But I would in turn ask, if they have no interest in him why don't they take him off of IR and send him down to the AHL. I think its clear that he is healthy enough to play. If they truly have no further interest, they would send him down and hope someone claims him. Even if no one claims him he would be less of a cap hit.
I think they will not play him this year until their playoff position is determined (or injuries force them to play him). That doesn't mean they have no further hope for him.