mercurial/registrar.py

--- a/mercurial/registrar.py	Sat Sep 30 07:45:07 2017 -0400
+++ b/mercurial/registrar.py	Sat Sep 30 07:45:41 2017 -0400
@@ -102,7 +102,6 @@
     def _extrasetup(self, name, func):
         """Execute exra setup for registered function, if needed
         """
-        pass
 
 class command(_funcregistrarbase):
     """Decorator to register a command function to table