How to clean up camera roll/All Photos on devices with shared iCloud account?
Make sure you have a backup of your images before trying this.

In iCloud settings, turn off iCloud Photo Library and My Photo Stream for all your iOS devices, including your Mac. Also make sure photo syncing is disabled in iTunes, just in case. Now connect each device to your mac and launch Image Capture. Select all the images you don't want, right click and select "Delete x Items". Do this on all devices before turning iCloud Photo Library and My Photo Stream back on. This should force iCloud to reset your My Photo Stream and iCloud Photo Library.