No need for unused LCD_PINS_Dn

Marlin/src/pins/pins_MELZI_CREALITY.h

 #define LCD_PINS_RS     28 // st9720 CS
 #define LCD_PINS_ENABLE 17 // st9720 DAT
 #define LCD_PINS_D4     30 // st9720 CLK
-#define LCD_PINS_D5     -1
-#define LCD_PINS_D6     -1
-#define LCD_PINS_D7     -1
 #define FIL_RUNOUT_PIN  -1 // Uses Beeper/LED Pin Pulled to GND
 
 // Alter timing for graphical display