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/clueboard/60/60.c

@@ -14,11 +14,3 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include "60.h"
-
-void matrix_init_kb(void) {
-
-}
-
-void matrix_scan_kb(void) {
-
-}