--- a/hgext/rebase.py	Sat Jul 14 23:00:22 2018 +0530
+++ b/hgext/rebase.py	Sun Jul 15 15:48:18 2018 +0530
@@ -34,7 +34,6 @@
     error,
     extensions,
     hg,
-    lock,
     merge as mergemod,
     mergeutil,
     obsolete,
@@ -52,8 +51,6 @@
     util,
 )
 
-release = lock.release
-
 # The following constants are used throughout the rebase module. The ordering of
 # their values must be maintained.