DRY up archive include

- Combine grid and list view into one include

_pages/tag-archive.html

@@ -6,12 +6,12 @@ author_profile: false
 ---
 
 {% include base_path %}
-{% include group-by-array collection=site.posts field='tags' %}
+{% include group-by-array collection=site.posts field="tags" %}
 
 {% for tag in group_names %}
   {% assign posts = group_items[forloop.index0] %}
   <h2 id="{{ tag | slugify }}" class="archive__subtitle">{{ tag }}</h2>
   {% for post in posts %}
-    {% include archive-list-single.html %}
+    {% include archive-single.html %}
   {% endfor %}
 {% endfor %}