Remove Codespaces screenshot

Author: ojacques

assets/images/codespaces-with-preview.jpg

@@ -29,8 +29,6 @@ As an alternative, you can simply use [GitHub Codespaces](https://github.com/fea
 
 In a matter of minutes, you will be ready to edit, preview and test your changes directly from the comfort of your browser.
 
-![](../assets/images/codespaces-with-preview.jpg)
-
 ## Site structure
 
 This site was originally a Ruby on Rails web application. Some time later it was converted into a static site powered by [Jekyll](https://jekyllrb.com/). A few years after that it was migrated to [Nanoc](https://nanoc.ws/), another Ruby static site generator.