removing printf in mdns service that was useless

Provider/main/mdns_service.cpp

@@ -6,7 +6,6 @@ static const char *kLogMDNS = "MDNS";
 
 void start_mdns()
 {
-  printf("MDNS: start_mdns() called\n");
   // Initialize mDNS
   esp_err_t err = mdns_init();
   if (err != ESP_OK)