With standard vending machines now using Caps, the purple/yellow light toggle needs a new function

[Cartlord]

Hacking a vending machine's purple light to yellow is meant to make job items free to people with different jobs - for instance, it would make all non-contraband seeds in a seed vendor free for everyone, when usually those're only free for Botanists. (we're talking about standard spess here)
However, as things are now, hacking it seems to do nothing. If nobody has any plans to replace this, I think we should remove that light, as well as remove one wire from hacking vendors.