I highly doubt they have removed him over health issues. He would have ro ask to no longer serve if that was the case, which may be why there was no announcement.
Fred Franz was blind, lost his mind and confined to the infirmary for atleast a year and was not removed until he died.
Swinger also lost his mind atleast 3 years before his death and wasn't removed. Schroeder was bed-ridden and stopped regularly attending all functions as well.
So unless he has an actual vice of some sort or a pride issue that caused his removal, this doesn't make sense.