Revert "Group talks by type"

This reverts commit 2d2cb25023.

source/talks.html.twig

@@ -1,20 +0,0 @@
----
-layout: page
-nav: talks
-title: Talks
-meta:
-    description: 'Information about previous and upcoming talks that Oliver has presented at conferences and user groups'
-use:
-    - talks
----
-<p>I regularly speak at conferences and user groups about a range of subjects including Drupal, Sculpin and Git. If you would like to me to speak at your group or conference, please <a href="mailto:{{ site.email }}?subject=Speaking%20enquiry">get in touch</a>.</p>
-<p>There is also information about events that I’ve attended and spoken at on my <a href="{{ site.lanyrd.url }}">Lanyrd</a> and <a href="{{ site.joindin.url }}">Joind.in</a> profiles.</p>
-
-<h2>Conferences</h2>
-
-{{ include('talk-list', { talks: data.talks, type: 'conference' }) }}
-
-<h2>User groups</h2>
-
-{{ include('talk-list', { talks: data.talks, type: 'meetup' }) }}
-