Hello Sheena, This also happened to me. I accidentally licensed an image by double clicking on it and would like that credit back. Can you please help? It is even a bad image I can't use for anything. The image number is: AdobeStock_136183080
Branching into a new discussion
I apologize as there is no way to unlicense the image but I have added 1 credit to your account so that you can use a different image instead.
Hope that helps!