No Attack Cooldown and Damage Delay FORGE

Removes the attack cooldown and the useless GUI element under the crosshair.

> Combat works like in older Minecraft versions.

> Works fine with other mods, unless they modify the same element using mixins.

- Yes, you need it on both client and server.

- Yes, you can use it in modpacks. No need to ask.

- No, I won't port it on demand. I'll do it when I feel like it.

-- You can post any issue in the comments.