Remove default baseurl setting from _config.yml

This no longer makes sense as a default setting when the recommended hosting platform is Netlify.
It may also be the case that GitHub Pages now automatically adds this setting anyway, which I will test.

Author: timwis

_config.yml

@@ -1,7 +1,6 @@
 title: JKAN
 greeting: Welcome to JKAN
 description: A lightweight, backend-free open data portal, powered by Jekyll.
-baseurl: /jkan
 logo: /img/jkan.png
 
 # Site theme