Merge pull request #1687 from dzaytsev91/small-ajax-fix

remove useless brackets

flask_admin/contrib/sqla/ajax.py

@@ -55,7 +55,7 @@ class QueryAjaxModelLoader(AjaxModelLoader):
         if not model:
             return None
 
-        return (getattr(model, self.pk), as_unicode(model))
+        return getattr(model, self.pk), as_unicode(model)
 
     def get_one(self, pk):
         # prevent autoflush from occuring during populate_obj