remove listener 1883 from mosquitto conf file

docker/mosquitto.conf

@@ -7,6 +7,3 @@ use_identity_as_username true
 cafile /mosquitto/certs/root.pem
 certfile /mosquitto/certs/server.pem
 keyfile /mosquitto/certs/server.key
-
-listener 1883 
-allow_anonymous true