Remove mholt/golang-graphics (#5504)

README.md

@@ -3683,7 +3683,6 @@ _Add the group of your city/country here (send **PR**)_
 - [Golang Nugget](https://golangnugget.com) - A weekly roundup of the best Go content, delivered to your inbox every Monday.
 - [Golang Resources](https://golangresources.com) - A curation of the best articles, exercises, talks and videos to learn Go.
 - [Golang Weekly](https://discu.eu/weekly/golang/) - Each monday projects, tutorials and articles about Go.
-- [golang-graphics](https://github.com/mholt/golang-graphics) - Collection of Go images, graphics, and art.
 - [golang-nuts](https://groups.google.com/forum/#!forum/golang-nuts) - Go mailing list.
 - [Google Plus Community](https://plus.google.com/communities/114112804251407510571) - The Google+ community for #golang enthusiasts.
 - [Gopher Community Chat](https://invite.slack.golangbridge.org) - Join Our New Slack Community For Gophers ([Understand how it came](https://blog.gopheracademy.com/gophers-slack-community/)).