Disabling Classic-Style swords?

[Fysez]

Alright so, I want to disable Classic-Like swords on my server.
Example: Era. They have guns and when you click S, a sword doesn't hit.

I want my server like that because I have future plans for different weapons.
I want it so you can kill, and get hurt, and everything. Just disable the whole S for sword thing. I'm not sure if it would go into server options or not,
So that's what I need help figuring out as well.

P.N. I would have looked it up, But I have no idea how to briefly explain it.