Remove unsupported 'updated' flag from _includes/post/date.html

Jekyll does not support this value for Page or Post classes. The
capture returned an empty Sting, which was always evaluated to true
in '{% if updated %}'.

.themes/classic/source/_includes/post/date.html

@@ -1,13 +1,7 @@
 {% capture date %}{{ page.date }}{{ post.date }}{% endcapture %}
 {% capture date_formatted %}{{ page.date_formatted }}{{ post.date_formatted }}{% endcapture %}
 {% capture has_date %}{{ date | size }}{% endcapture %}
-{% capture updated %}{{ page.updated }}{{ post.updated }}{% endcapture %}
-{% capture was_updated %}{{ updated | size }}{% endcapture %}
 
 {% if has_date != '0' %}
-  {% capture time %}<time datetime="{{ date | datetime | date_to_xmlschema }}" pubdate {% if updated %} data-updated="true" {% endif %}>{{ date_formatted }}</time>{% endcapture %}
+  {% capture time %}<time datetime="{{ date | datetime | date_to_xmlschema }}" pubdate>{{ date_formatted }}</time>{% endcapture %}
 {% endif %}
-
-{% if was_updated != '0' %}
-  {% capture updated %}<time class="updated" datetime="{{ updated | datetime | date_to_xmlschema }}">Updated {{ updated | ordinalize }}</time>{% endcapture %}
-{% else %}{% assign updated = false %}{% endif %}

.themes/classic/source/_layouts/page.html

@@ -15,7 +15,7 @@ layout: default
     <footer>
       {% if page.date or page.author %}<p class="meta">
         {% if page.author %}{% include post/author.html %}{% endif %}
-        {% include post/date.html %}{% if updated %}{{ updated }}{% else %}{{ time }}{% endif %}
+        {% include post/date.html %}{{ time }}
         {% if page.categories %}{% include post/categories.html %}{% endif %}
       </p>{% endif %}
       {% unless page.sharing == false %}

.themes/classic/source/_layouts/post.html

@@ -9,7 +9,7 @@ single: true
   <footer>
     <p class="meta">
       {% include post/author.html %}
-      {% include post/date.html %}{% if updated %}{{ updated }}{% else %}{{ time }}{% endif %}
+      {% include post/date.html %}{{ time }}
       {% include post/categories.html %}
     </p>
     {% unless page.sharing == false %}