namespaces: remove templatename method on the namespaces object

Now that there is an object for each individual namespace, we use the
templatename property on that object instead of the method on the collection of
namespaces.

mercurial/namespaces.py

@@ -85,10 +85,6 b' class namespaces(object):'
                 return n[0]
         raise KeyError(_('no such name: %s') % name)
 
-    def templatename(self, namespace):
-        """method that returns the template name of a namespace"""
-        return self._names[namespace].templatename
-
 class namespace(object):
     """provides an interface to a namespace