The Golang Gopher is a design of Renee French, and the lack of attribution here is disappointing. Wouldn't these derivative works also be covered by her copyright?
That's pretty much what I was trying to say... you can decline to add more license to your own work, and decline to ask for your own attribution, but you can't erase the underlying license and WTFPL the whole thing, as the only license.
Good that you took action. But it is still not compliant. You must link to original work by Renee. You need include link to her blog, where she posted the design.
> If supplied, you must provide the name of the creator and attribution parties, a copyright notice, a license notice, a disclaimer notice, and a link to the material.
For reference, here is how official Golang README puts it:
We will put right license here. Just tell us what to write to not break other licenses. We updated old images and added own new.
So how to be here? I think we should add license of original authors (while Olga updated them and put into ai). And put own license (free to any use) to others. Could you make right pull request here?
If golang has this much interest in mascot images, then game over. Time to start writing all services in golang. Sorry c# and Rust, you just don't have the same swaggage. Screw generics.
I also don't think too much about licenses problem and make things instead. Please, help us to add right licenses where appropriate and feel free to add yours to keep all such artwork in one place.
https://blog.golang.org/gopher