--- a/mercurial/revlog.py	Sat Sep 07 00:26:15 2019 +0200
+++ b/mercurial/revlog.py	Sat Sep 07 00:34:20 2019 +0200
@@ -261,7 +261,7 @@
             p = versionformat_pack(version) + p[4:]
         return p
 
-class revlog(flagutil.flagprocessorsmixin):
+class revlog(object):
     """
     the underlying revision storage object