Revert "Group talks by type"

This reverts commit 2d2cb25023.

source/_includes/talk-list-item.html.twig

@@ -1,6 +0,0 @@
-<li>
-    {{ talk.event.name }} -
-    <a href="{{ talk.url }}">
-        {{ talk.title }}
-    </a>
-</li>

source/_includes/talk-list.html.twig

@@ -1,5 +0,0 @@
-<ul>
-    {% for talk in talks if talk.type == type %}
-        {{ include('talk-list-item') }}
-    {% endfor %}
-</ul>

source/_includes/talk-listing-item.html.twig

@@ -0,0 +1,6 @@
+{{ talk.event.name }} -
+{% if talk.fuzzy_date %}
+    {{ talk.title }}
+{% else %}
+    <a href="{{ talk.url }}">{{ talk.title }}</a>
+{% endif %}