Remove spy/arcfiend only rounds

[TheMaskedMan2]

I'm back again on more thoughts. Let's actually remove Spy Thief only rounds, why in the world we have five antags at once but all of them share the same-size loot pool of rng things that only refreshes once in the round far too slow is beyond me. I understand the intent is they compete or whatever but in practice it's nothing like that, it's just Traitor but slower and more limiting. Where you can be stuck with no gear or items at all cause the rng didn't spawn any good ones and the one good one was taken by someone else.