remove chapter display on pages

templates/page.html

@@ -8,7 +8,7 @@
 <article>
     <header class="post-header">
         <h1>{{ page.title }}</h1>
-{% if page.extra.chapter %}<span class="chapter">{{ page.extra.chapter }} | </span>{% endif %}{% if page.date %}<time datetime="{{ page.date }}">{{ page.date | date(format="%B %d, %Y") }}</time>{% endif %}
+        {% if page.date %}<time datetime="{{ page.date }}">{{ page.date | date(format="%B %d, %Y") }}</time>{% endif %}
     </header>
     <div class="content">
         {% if page.content is containing("<!--TOC_PLACEHOLDER-->") %}