Tyson Fury has officially abdicated the Ring Magazine heavyweight championship and retired (again).
The WBC hasn't officially stripped him at this point but it's probably a matter of time. If he gave back the Ring belt, which you don't have to pay for, he's definitely not going to keep paying those WBC sanctioning fees.
Oleksandr Usyk and Anthony Joshua are both ranked in the top 2 by both the TBRB and Ring Magazine, meaning their rematch next week will now be for the vacant lineal and Ring Magazine world championships as well as the WBA, WBO, IBF, and IBO world titles.
Deontay Wilder is ranked #1 by the WBC, so either his upcoming fight with Robert Helenius will be for the vacant belt or (assuming he wins) he'll be matched with the winner of Ortiz/Ruiz or Parker/Joyce next time out.