feat: hide blog

It hasn't been updated in a long time.

Author: trollixx

_includes/nav.html

@@ -22,9 +22,6 @@
           <a href="/contact.html">Contact</a>
         </li>
       </ul>
-      <ul class="nav navbar-nav navbar-right">
-        <li{% if page.url contains '/blog/' %} class="active"{% endif %}><a href="/blog/">Blog</a></li>
-      </ul>
     </nav>
   </div>
 </header>