Update the tests to work with oragono

tests/end_to_end/scenarios/channel_messages.py

@@ -46,7 +46,6 @@ scenario = (
     # Do the exact same thing, from a different chan,
     # to check if the response comes from the right JID
     send_stanza("<presence from='{jid_one}/{resource_one}' to='#dummy%{irc_server_one}/{nick_one}' ><x xmlns='http://jabber.org/protocol/muc'/></presence>"),
-    expect_stanza("/message"),
     expect_stanza("/presence/muc_user:x/muc_user:status[@code='110']"),
     expect_stanza("/message[@from='#dummy%{irc_server_one}'][@type='groupchat']/subject"),
     # Send a private message, to a in-room JID