We no longer use 'maybe' in this module

(cherry picked from commit 9e649ae)

Author: michaelklishin

deps/rabbit/src/rabbit.erl

@@ -11,8 +11,6 @@
 -include_lib("kernel/include/logger.hrl").
 -include_lib("rabbit_common/include/logging.hrl").
 
--feature(maybe_expr, enable).
-
 -behaviour(application).
 
 -export([start/0, boot/0, stop/0,