[MERGED PR] Removes the security alert HUD button

[mralexs]

Another way to counter it is ambush the secoff, run off after they sent it, then hit them again when the cool down is still going and the responders have dispersed. This is the number one thing that has gotten me killed when I play as HoS. I'm not a fan of these PR's that are basically "nerf sec" instead of making changes to help antags play smarter.