It is very easy for them to drop the clyde/cartman being charlie kirk thing as Clyde doesn't want to do it anymore and cartman lost the status as being that guy
Cartman will go back to trying to figure out what to do and clyde will just be clyde and probably not be used for the rest of the season
Trey and Matt both know that if they lean on the charlie kirk thing theres a chance that they will be killed/sued