Porta sci program removal thread

[getbrecked]

On first examination, I didn't like this change, but after playing a few rounds with it I think it's a good thing. Mostly because it encourages mechanics to actually do their job by scanning the port-a-sci remote. I do think removing the program from AI is a bit inconvenient, but it does prevent the AI from teleporting revs into security or security into a bolted room, which is a very good thing.