Remove demo link in between arrows (#3)

Author: Philip Larsson

README.md

@@ -1,6 +1,6 @@
 # Exercise #4: HTML Link Parser
 
-[![exercise status: released](https://img.shields.io/badge/exercise%20status-released-green.svg?style=for-the-badge)](https://gophercises.com/exercises/link) <!--[![demo: ->](https://img.shields.io/badge/demo-%E2%86%92-yellow.svg?style=for-the-badge)](https://gophercises.com/demos/cyoa/)-->
+[![exercise status: released](https://img.shields.io/badge/exercise%20status-released-green.svg?style=for-the-badge)](https://gophercises.com/exercises/link)
 
 ## Exercise details