Remove dead link

The raw html which can be found on the repository states:
	Update 08/09/2015: This tutorial has been written during the first days of Wagtail, when documentation and tutorials about it were sparce; right now it should be considered by all accounts obsolete and not be followed! Instead, you should read the official (and very well written) tutorial in the official Wagtail documentation!

docs/advanced_topics/third_party_tutorials.rst

@@ -22,7 +22,6 @@ Third-party tutorials
 * `Wagtail notes: dynamic templates per page <http://www.coactivate.org/projects/ejucovy/blog/2014/05/10/wagtail-notes-dynamic-templates-per-page/>`_ (10 May 2014)
 * `Wagtail notes: type-constrained PageChooserPanel <http://www.coactivate.org/projects/ejucovy/blog/2014/05/09/wagtail-notes-type-constrained-pagechooserpanel/>`_ (9 May 2014)
 * `How to Run the Wagtail CMS on Gondor <https://gondor.io/blog/2014/02/14/how-run-wagtail-cms-gondor/>`_ (14 February 2014)
-* `The first Wagtail tutorial <http://spapas.github.io/2014/02/13/wagtail-tutorial/>`_ (13 February 2014)
 
 .. tip::