Cleanup trailing whitespace

@Bob-the-Kuhn — Please set your git options to remove trailing whitespace on commit.

Marlin/src/pins/pins_DUE3DOM_MINI.h

@@ -156,7 +156,7 @@
     #define BTN_ENC         37
 
     #define BEEPER_PIN      -1
-    
+
    #elif ENABLED(MINIPANEL)
     #define BTN_EN1         52
     #define BTN_EN2         50
@@ -166,6 +166,6 @@
     #define BEEPER_PIN      41
     #define DOGLCD_A0       46
     #define DOGLCD_CS       45
-    
+
   #endif // SPARK_FULL_GRAPHICS
 #endif // ULTRA_LCD