Update platformio.ini

Author: Jason2866

examples/arduino-blink/platformio.ini

@@ -35,7 +35,6 @@ custom_sdkconfig        = '# CONFIG_BT_ENABLED is not set'
                           '# CONFIG_LWIP_PPP_SUPPORT is not set'
 custom_component_remove = espressif/esp_hosted
                           espressif/esp_wifi_remote
-                          espressif/mdns
                           espressif/esp-dsp
                           espressif/esp_modem
                           espressif/esp32-camera