diff -r af0b21d5a930 -r 6000f5b25c9b mercurial/stack.py
--- a/mercurial/stack.py	Sun Feb 20 15:18:15 2022 -0700
+++ b/mercurial/stack.py	Thu Mar 03 17:34:00 2022 +0100
@@ -5,8 +5,6 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
-from __future__ import absolute_import
-
 
 def getstack(repo, rev=None):
     """return a sorted smartrev of the stack containing either rev if it is