diff --git a/remotefilelog/__init__.py b/remotefilelog/__init__.py
--- a/remotefilelog/__init__.py
+++ b/remotefilelog/__init__.py
@@ -279,9 +279,6 @@
         return
     clientonetime = True
 
-    # some users in core still call changegroup.cg1packer directly
-    changegroup.cg1packer = shallowbundle.shallowcg1packer
-
     packermap = None
     if util.safehasattr(changegroup, 'packermap'):
         packermap = changegroup.packermap