mercurial/changegroup.py

--- a/mercurial/changegroup.py	Fri Dec 27 13:13:33 2019 -0500
+++ b/mercurial/changegroup.py	Fri Dec 27 13:18:19 2019 -0500
@@ -287,8 +287,6 @@
         def revmap(x):
             return cl.rev(x)
 
-        changesets = 0
-
         try:
             # The transaction may already carry source information. In this
             # case we use the top level data. We overwrite the argument