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/sck/neiso/neiso.c

@@ -14,17 +14,3 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include "neiso.h"
-
-// Optional override functions below.
-// You can leave any or all of these undefined.
-// These are only required if you want to perform custom actions.
-
-/*
-
-void led_set_kb(uint8_t usb_led) {
-  // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
-
-  led_set_user(usb_led);
-}
-
-*/