diff --git a/mercurial/bundle2.py b/mercurial/bundle2.py
--- a/mercurial/bundle2.py
+++ b/mercurial/bundle2.py
@@ -1314,10 +1314,6 @@ def writebundle(ui, cg, filename, bundle
 
     # parse the changegroup data, otherwise we will block
     # in case of sshrepo because we don't know the end of the stream
-
-    # an empty chunkgroup is the end of the changegroup
-    # a changegroup has at least 2 chunkgroups (changelog and manifest).
-    # after that, an empty chunkgroup is the end of the changegroup
     return changegroup.writechunks(ui, chunkiter, filename, vfs=vfs)
 
 @parthandler('changegroup', ('version', 'nbchanges', 'treemanifest'))