When you delete the rows from the spreadsheet, the Product Images will remain in the media library by default because they might be used by other products.
However, if you want to delete the images when the product is deleted, go to Settings > Advanced Settings > Misc > Activate “Delete the attached images when deleting a post?”
Notes:
- This will apply to all your spreadsheets, including products, posts, pages, and all other images attached to the posts you delete on our spreadsheets.
- If you activate this option and the same image is used in multiple products, it will be deleted and the other products will be without image.