Like it or not, this is really just legislative housekeeping & goes on all the time with laws rejected or modified by the courts.
Court rulings can eventually be overruled, can they not?
Just because no one is currently standing for the 10th amendment doesn’t mean there won’t be a strong Constitutionalist in the future.
If the “question” is supposedly settled now, it seems as though the only reason to eat up legislative resources on a blatant repeal is a fear that someday sanity might come back to the body politic.