Unfortunately, Mugabe is not a Ravenous Bugblatter Beast of Traal and will not go away if we ignore him.

We can say he is not president or the chief poobah but as long as there are people willing to supply his thugs with arms and ammunition (even sans that, we have seen clubs & machetes will do just fine) he will remain in place and there will be no “civilized” way of removing him from office. Either he dies at the hands of another strongman’s coup or he dies of old age, I believe it will be the former.