Hi Larry,
I have been shooting RAW+JPEG, but now I only shoot RAW. Almost all the RAW files in my library are (or were, but I can restore from a backup) part of a RAW+JPEG pair from the camera.
All files come from Aperture, I have not imported any photos directly into Photos. In Aperture these photos were both inported, with the RAW as the "original". I assumed that Photos imported both and stacked them in the same way.
What I did was:
1: create a smart album with "Photo is not favourite" and "Photo is RAW"
2: go to that album, select all, press command-backspace
3: go to edit --> show recently deleted , select all, click "delete all"-button in upper right corner
I find Photos a bit lacking, and Aperture is a blind end, so I bought Capture One 8. Great program, but expensive. My plan is to use Photos for syncing with my iCloud drive (and my iPhone), sharing, and ordering products from the Apple Store. Would like to shrink the library primary to be able to have it on my 240 GB SSD, and secondary to get away with a smaller iCloud drive.