Remove redundant needs war explanation code
It is impossible to do "Conquer City" to a city that contains any units. This means that the target city can't contain a unit from a nation the actor isn't at war with. Remove action specific action not enabled explanation code that is supposed to detect this.
Not sure how to fill out the tags.
Intended for version 3.0 and 3.1. I set target version to "3.0.0" since it is the oldest of those.
Intended to open the 36h objection window. I don't see a "Ready For Test" status so I'm setting the status to "In Progress".