Remove module-level factory methods in favor of having a factory class-method

on wsgi components themselves.  Local options from config are passed to the
__init__ method of the component as kwargs.

nova/api/openstack/auth.py

@@ -134,9 +134,3 @@ class AuthMiddleware(wsgi.Middleware):
             token = self.db.auth_create_token(ctxt, token_dict)
             return token, user
         return None, None
-
-
-def auth_factory(global_conf, **local_conf):
-    def auth(app):
-        return AuthMiddleware(app)
-    return auth