The picture must be stored in a folder on your hard drive somewhere. I think you need to search for it and delete it. The problem will be that you don't know the name or file format, although it will almost certainly be a jpg file.
This thread is now locked and can not be replied to.
Apple Event as it happened | Apple October Event live blog: Apple unveils new MacBook Pro at…
1995-2015: How technology has changed the world in 20 years
Graeme Messer's exhibition aims to challenge fears and insecurities
New MacBook Pro release date, price and specs | New MacBook Pro 2016 announced: Now with Touch Bar…
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.