WIP Remove CQv1

Author: lhoguin

deps/rabbit/src/rabbit_classic_queue.erl

@@ -430,6 +430,7 @@ supports_stateful_delivery() -> true.
 deliver(Qs0, Msg0, Options) ->
     %% add guid to content here instead of in rabbit_basic:message/3,
     %% as classic queues are the only ones that need it
+    %% @todo Only if multiple queues.
     Msg = mc:prepare(store, mc:set_annotation(id, rabbit_guid:gen(), Msg0)),
     Mandatory = maps:get(mandatory, Options, false),
     MsgSeqNo = maps:get(correlation, Options, undefined),