Remove empty override functions (#14312)

* Remove empty override functions, 0-9

* Remove empty override functions, A-D

* Remove empty override functions, E-H

* Remove empty override functions, handwired

* Remove empty override functions, I-L

* Remove empty override functions, M-P

* Remove empty override functions, Q-T

* Remove empty override functions, U-Z

keyboards/alpha/keymaps/default/keymap.c

@@ -41,9 +41,3 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 		KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO,
 		KC_NO, KC_NO, KC_NO, TO(0), MACRO1, KC_NO, KC_NO, KC_NO),
 };
-
-void matrix_init_user(void) {
-}
-
-void matrix_scan_user(void) {
-}