main: minor, remove duplicate code

main.c

@@ -370,7 +370,6 @@ void main(void)
 						load_edid(); // re-load EDID from EEPROM
 						edid_valid = (0 != edid_length()); // verify if EDID is valid
 					}
-					i2c_master_release(); // release I²C again
 				} else { // button pressed > 3s
 					run_led_on(); // indicate we started
 					if (edid_valid) {