diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -38,9 +38,6 @@ from typing import (
 
 from .i18n import _
 from .node import hex
-from .pycompat import (
-    open,
-)
 
 from . import (
     color,