[Bug] Prevent the science teleporter from pulling in turfs z2/z4

[Erik]

When recieving bad coordinates on the science teleporter, it would sometimes pull turfs from a restricted z.

https://gist.github.com/Chnkr/c1480d3eea80f277a660

[Haine]

The telesci stuff in obj/machinery/science_teleporter.dm is all commented out, the actual telesci control stuff is in WorkInProgress/computer3/mainframe2/telesci.dm.

I don't need a new patch or anything since this is tiny but just wanted to let you know to watch out for crap like that (and also wonder how you missed that everything was commented out in the file you edited)