Remove HTML from docs copyright

Sphinx default theme doesn't support it

doc/conf.py

@@ -84,14 +84,9 @@
 # General information about the project.
 project = u'CKAN Documentation'
 project_short_name = u'CKAN'
-copyright = u'''&copy; 2009-2013, <a href="http://okfn.org/">Open Knowledge Foundation</a>.
-    Licensed under <a
-    href="http://creativecommons.org/licenses/by-sa/3.0/">Creative Commons
-    Attribution ShareAlike (Unported) v3.0 License</a>.<br />
-    <img src="http://i.creativecommons.org/l/by-sa/3.0/80x15.png" alt="CC License Logo" />
-    <a href="http://opendefinition.org/"><img src="http://assets.okfn.org/images/ok_buttons/oc_80x15_blue.png" border="0" 
-      alt="{{ _('Open Content') }}" /></a>
-  '''
+copyright = u'''2009-2013,Open Knowledge Foundation.
+    Licensed under Creative Commons Attribution ShareAlike (Unported) v3.0 License'''
+
 html_show_sphinx = False
 
 # The version info for the project you're documenting, acts as replacement for