Omit social media links

_includes/footer.html

@@ -14,17 +14,7 @@
 
       <div class="footer-col footer-col-2">
         <ul class="social-media-list">
-          {% if site.github_username %}
-          <li>
-            {% include icon-github.html username=site.github_username %}
-          </li>
-          {% endif %}
-
-          {% if site.twitter_username %}
-          <li>
-            {% include icon-twitter.html username=site.twitter_username %}
-          </li>
-          {% endif %}
+
         </ul>
       </div>