Update _navigation.html

_includes/_navigation.html

@@ -12,7 +12,6 @@
 		    	{% assign links = site.pages | where_exp: "item", "item.menuorder != nil" %}
 		    	{% assign alllinks = links | concat: site.data.navigation | sort: 'menuorder' %}
 		        {% for link in alllinks %}
-			    {{site.github.url}}
 			    	{% if link.menuorder %}{% assign url = link.url | prepend: site.github.url %}{% else %}{% assign url = link.url %}{% endif %}
                                    <li><a href="{{ url }}" {% if link.url contains 'http' %}target="_blank"{% endif %}>
 				    {% if link.menutitle %}