diff -r c627fe32c923 -r 570ea0259b0a mercurial/util.py
--- a/mercurial/util.py	Fri Jul 22 09:55:46 2011 +0200
+++ b/mercurial/util.py	Fri Jul 22 10:31:56 2011 +0200
@@ -475,9 +475,6 @@
             return _("filename ends with '%s', which is not allowed "
                      "on Windows") % t
 
-def lookupreg(key, name=None, scope=None):
-    return None
-
 def hidewindow():
     """Hide current shell window.