I suspect you just need to delete the flac file, without that, the rest won’t mean anything to Sonos. But delete them too, just to remove them and clean up disk space (albeit not much, but still, no need for them.). 

Just remember to update your music library (the process in the Sonos controller) once you’ve deleted them, otherwise they’ll show up until that process is run. 

Thank you. That’s what I suspected, but I was a little afraid to start deleting files in the shared folder without being sure how they all relate to  the Sonos Music Library. I did try deleting all the related files to that Album and that did remove all the tracks and the album itself from my Music Library. So apparently that does work.

I think my main problem was using EAC, Exact Audio Copy, to rip my CDs to flac. This created a bunch of extra files that I did not understand (log, cue, m3u8 files along with the flac file) and I was not sure if they were all necessary. I didn’t know if I could delete them or if some were necessary for the integrity of the album. As it turns out, for me, they are not necessary. I am now ripping CDs to flac with Windows Media Player and it does not produce those extra files and for me it is much easier. I just deleted all the extra files created by EAC. And you are correct, All I need to do to delete a track is delete the flac file.

Thanks for your help.