Since Usyk has no plans to fight Kabayel, should he vacate the WBC title?

Usyk is my favorite fighter, but I'm not some silly fanboy who puts a boxer above fair criticism.

He has said he will fight only three more times: Rico, the winner of Wardley-Dubois, and...

Since Usyk has no plans to fight Kabayel, should he vacate the WBC title?