Update hmi.h
Update hmi.h

Remove license
FireDeveloper/ITEADLIB_Arduino_Nextion,FireDeveloper/ITEADLIB_Arduino_Nextion,itead/ITEADLIB_Arduino_Nextion,itead/ITEADLIB_Arduino_Nextion,itead/ITEADLIB_Arduino_Nextion,itead/ITEADLIB_Arduino_Nextion