Can I remove the non working a/c compressor from my '85 Chevy S 10 Pu truck? It is not working and I want to get it out of the way.
Yes, you can remove it. Not knowing which engine you have in your vehicle, it's hard to tell you exactly what you'll need. Some engines, depending on the AC placement, will just require a shorter belt. Others will need a separate idler pulley which you put in place of the AC compressor. All it does it takes up the slack.
Conversely, if you aren't too worried about the AC compressor and are just wanting to remove it, you may consider just leaving it in place. While the pulley on the AC does not create a lot of parasitic drag on the fan belt, because it is just free wheeling the pulley. It would act pretty much like what an idler pulley does if you need to put one back in the compressors place.