Fix issues with unused variables and functions preventing a clean compile.

quantum/process_keycode/process_rgb.c

@@ -23,6 +23,7 @@ typedef void (*rgb_func_pointer)(void);
  *
  * noinline to optimise for firmware size not speed (not in hot path)
  */
+#if !(defined(RGBLIGHT_DISABLE_KEYCODES) || defined(RGB_MATRIX_DISABLE_KEYCODES))
 static void __attribute__((noinline)) handleKeycodeRGB(const uint8_t is_shifted, const rgb_func_pointer inc_func, const rgb_func_pointer dec_func) {
     if (is_shifted) {
         dec_func();
@@ -30,6 +31,7 @@ static void __attribute__((noinline)) handleKeycodeRGB(const uint8_t is_shifted,
         inc_func();
     }
 }
+#endif
 
 /**
  * Wrapper for animation mode
@@ -56,7 +58,9 @@ bool process_rgb(const uint16_t keycode, const keyrecord_t *record) {
     // Split keyboards need to trigger on key-up for edge-case issue
     if (!record->event.pressed) {
 #endif
+#if !(defined(RGBLIGHT_DISABLE_KEYCODES) || defined(RGB_MATRIX_DISABLE_KEYCODES))
         uint8_t shifted = get_mods() & MOD_MASK_SHIFT;
+#endif
         switch (keycode) {
             case RGB_TOG:
 #if defined(RGBLIGHT_ENABLE) && !defined(RGBLIGHT_DISABLE_KEYCODES)