note that `finishTerminate` is only called in else of this if https://github.com/RickLatrine/akka/blob/4e92e82c27b3413cf2ec5eace13741e645f463c1/akka-actor/src/main/scala/akka/actor/dungeon/FaultHandling.scala#L152

This change will always `unwatchWatchedActors`. Is that difference taken into consideration?