Delete [old] header.html

webpage/_includes/[old] header.html

-<header class="site-header">
-
-  <div class="wrapper">
-
-    <a class="site-title" href="{{ site.baseurl }}/">{{ site.title }}</a>
-
-    <nav class="site-nav">
-      <a href="#" class="menu-icon">
-        <svg viewBox="0 0 18 15">
-          <path fill="#424242" d="M18,1.484c0,0.82-0.665,1.484-1.484,1.484H1.484C0.665,2.969,0,2.304,0,1.484l0,0C0,0.665,0.665,0,1.484,0 h15.031C17.335,0,18,0.665,18,1.484L18,1.484z"/>
-          <path fill="#424242" d="M18,7.516C18,8.335,17.335,9,16.516,9H1.484C0.665,9,0,8.335,0,7.516l0,0c0-0.82,0.665-1.484,1.484-1.484 h15.031C17.335,6.031,18,6.696,18,7.516L18,7.516z"/>
-          <path fill="#424242" d="M18,13.516C18,14.335,17.335,15,16.516,15H1.484C0.665,15,0,14.335,0,13.516l0,0 c0-0.82,0.665-1.484,1.484-1.484h15.031C17.335,12.031,18,12.696,18,13.516L18,13.516z"/>
-        </svg>
-      </a>
-
-      <div class="trigger">
-        {% for my_page in site.pages %}
-          {% if my_page.title %}
-          <a class="page-link" href="{{ my_page.url | prepend: site.baseurl }}">{{ my_page.title }}</a>
-          {% endif %}
-        {% endfor %}
-      </div>
-    </nav>
-
-  </div>
-
-</header>