Remove captains ability to roll antag

[Trustworthy]

By the way - Vampire Captain is a whole load of fun - and I see no reason to topple this one...I'd dearly miss the early blood-drive AI law changes.

Captain ling is also alright...in all honesty I see no real reason to scrap those roles from the Captains possible Antag roles.

The issue is that ime, at least, it's only really fun for the antagonist, as vampire and ling are designed to be viable using only their abilities, and indeed, I've gotten nearly 3000u of blood doing exactly that. When you add armor, an egun, and AA into the mix, you've suddenly got an enemy that is basically unbeatable with no effort on their part. I think making the captain only able to be a hardmode would be an alright compromise,  although it's not my ideal solution. It would help make fighting an antagonist captain a bit less frustrating, which is what this post is really about.