Teams with cap space have dried up but only 5 teams including the Cavs are in luxury tax. Miami might be the only one that wants to clear to get off luxury tax but they are only ~2 million into the luxury tax after they sign Tyler Hero.
Also there are trade exception out there that would most likely be more appealing than JRs contract to clear cap with.
At this point I actually think adding JRs contract to a bigger trade so a team can absorb a player they want in another trade or in a 3 way is really the only way he is getting traded. The common value won't be there for both sides to do a salary dump.
I think at the end we are either including him in a bigger trade or more than likely waiving and stretching his guaranteed money to get under the luxury tax.