--- a/hgext3rd/evolve/__init__.py	Mon Dec 09 19:44:10 2019 +0700
+++ b/hgext3rd/evolve/__init__.py	Mon Dec 09 16:40:53 2019 +0700
@@ -251,7 +251,6 @@
 """.strip()
 
 import sys
-import struct
 
 try:
     from mercurial import registrar
@@ -326,9 +325,6 @@
               b'evolve.operation': b'bold'
               }
 
-_pack = struct.pack
-_unpack = struct.unpack
-
 aliases, entry = cmdutil.findcmd(b'commit', commands.table)
 
 # This extension contains the following code