Move remaining LAYOUTs to data driven (#20422)

keyboards/mxss/mxss.c

@@ -16,11 +16,9 @@
  * EEPROM management code from ../cannonkeys/stm32f072/keyboard.c
  */
 
-#include "mxss.h"
+#include "quantum.h"
 #include "eeprom.h"
-#include "action_layer.h"
-#include "rgblight.h"
-#include "via.h"
+#include "mxss_frontled.h"
 #include "version.h" // for QMK_BUILDDATE used in EEPROM magic
 
 void via_init_kb(void) {