How do I remove a Faction (specifically, the Stronghold) from the available options entirely?

folder \MapObjects\_(AdvMapSharedGroup)\Towns - the any.xdb file contains the paths to the towns; remove the unnecessary ones.

Thank you very much! And demonically too. It seems like everything worked. You can still select Stronghold in the menu, but if you try to enter, the game crashes. And on random maps, I've already played a decent amount on an 8x map, and it doesn't give you Orcs. So, I'll believe that everything worked! :D
*The answer came at just the right time; I just finished the patch, and then you helped me close the issue with Stronghold.
Now, new friends are playing for Inferno on Tier 5 ;) And Stronghold is on rework for now; when the time comes, we'll organize a new faction!