fixup! WIP: posts: add mutiple-dispatch-in-c++

content/posts/2022-06-07-multiple-dispatch-in-c++/index.md

@@ -189,16 +189,6 @@ e.g: compilers, where the AST class hierarchy represents the data *only*, and
 all compiler stages and optimization passes are programmed by a series of
 visitors.
 
-One downside of this approach is that if you want to add `SpaceStation` as
-a sub-class of `SpaceObject`, and handle its collisions with other
-`SpaceObject`s, you need to:
-
-* Implement all `collide_with` methods for this new class.
-* Add a new virtual method `collide_with(SpaceStation&)` and implement it on
-  every sub-class.
-
-This can be inconvenient if your class hierarchy changes often.
-
 ## Multiple dispatch on a closed class hierarchy
 
 When even double dispatch is not enough, there is a way to do multiple dispatch