diff -r a86d21e70b2b -r 9c2c77c73f23 mercurial/httppeer.py
--- a/mercurial/httppeer.py	Wed Sep 12 09:58:23 2018 -0700
+++ b/mercurial/httppeer.py	Wed Sep 12 10:01:16 2018 -0700
@@ -802,8 +802,7 @@
             return True
 
         # Other concepts.
-        # TODO remove exchangev2 once we have a command implemented.
-        if name in ('bundle2', 'exchangev2'):
+        if name in ('bundle2'):
             return True
 
         # Alias command-* to presence of command of that name.