fixup! CQ: Remove set_queue_mode/set_queue_version

Author: lhoguin

deps/rabbit/src/rabbit_backing_queue.erl

@@ -36,9 +36,6 @@
 -type msg_fun(A) :: fun ((mc:state(), ack(), A) -> A).
 -type msg_pred() :: fun ((rabbit_types:message_properties()) -> boolean()).
 
--type queue_mode() :: atom().
--type queue_version() :: pos_integer().
-
 %% Called on startup with a vhost and a list of durable queue names on this vhost.
 %% The queues aren't being started at this point, but this call allows the
 %% backing queue to perform any checking necessary for the consistency