Remove the 'rc' field from DEFAULT_SUBOPTS

include/emqx_client.hrl

@@ -1,4 +1,5 @@
-%% Copyright (c) 2013-2019 EMQ Technologies Co., Ltd. All Rights Reserved.
+%%--------------------------------------------------------------------
+%% Copyright (c) 2019 EMQ Technologies Co., Ltd. All Rights Reserved.
 %%
 %% Licensed under the Apache License, Version 2.0 (the "License");
 %% you may not use this file except in compliance with the License.
@@ -11,6 +12,7 @@
 %% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 %% See the License for the specific language governing permissions and
 %% limitations under the License.
+%%--------------------------------------------------------------------
 
 -ifndef(EMQX_CLIENT_HRL).
 -define(EMQX_CLIENT_HRL, true).

include/emqx_mqtt.hrl

@@ -204,8 +204,7 @@
 -define(DEFAULT_SUBOPTS, #{rh  => 0, %% Retain Handling
                            rap => 0, %% Retain as Publish
                            nl  => 0, %% No Local
-                           qos => 0, %% QoS
-                           rc  => 0  %% Reason Code
+                           qos => 0  %% QoS
                           }).
 
 -record(mqtt_packet_connect, {