remove signal

samples/mqtt/mqtt_sample.c

@@ -185,9 +185,6 @@ static int _register_subscribe_topics(void *client)
 static void mqtt_test_thread(void) {    
     int rc;
     
-    // to avoid process crash when writing to a broken socket
-    signal(SIGPIPE, SIG_IGN);
-    
     //init connection
     MQTTInitParams init_params = DEFAULT_MQTT_INIT_PARAMS;
     rc = _setup_connect_init_params(&init_params);