Revert "Group talks by type"

This reverts commit 2d2cb25023.

source/talks.md

@@ -0,0 +1,17 @@
+---
+layout: default
+nav: talks
+title: Talks
+meta:
+    description: 'Information about previous and upcoming talks that Oliver has presented at conferences and user groups'
+use:
+    - talks
+---
+# Talks
+
+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>.
+
+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.
+
+{{ include('upcoming-talks') }}
+{{ include('previous-talks') }}