Remove RGB_DI_PIN ifdefs (#20218)

keyboards/ft/mars65/config.h

@@ -4,7 +4,6 @@
 #pragma once
 
 #define RGB_DI_PIN E6
-#ifdef RGB_DI_PIN
     #define RGBLED_NUM 24
     #define RGBLIGHT_HUE_STEP 8
     #define RGBLIGHT_SAT_STEP 8
@@ -21,7 +20,6 @@
     #define RGBLIGHT_EFFECT_RGB_TEST
     #define RGBLIGHT_EFFECT_ALTERNATING
     #define RGBLIGHT_EFFECT_TWINKLE
-#endif
 
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 // https://noroadsleft.github.io/kbf_qmk_converter/