Remove "baseurl" from _config.yml

Remove baseurl from the config for three reasons:

1. It's not used anyplace within the site

2. The site’s base URL is only to be used when the resulting site
lives at a subpath of the domain. Otherwise, the subpath should be
nil, not /.

3. When the Pages Gem is loaded as part of the :jekyll_plugins
group, baseurl and url are set automatically.

_config.yml

@@ -7,7 +7,6 @@ kramdown:
   html_to_native: true
   hard_wrap: false
   syntax_highlighter: rouge
-baseurl: /
 incremental: true
 
 safe: false