Remove matrix size defines (#19581)

keyboards/rart/rartpad/config.h

@@ -18,10 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 
-/* key matrix size */
-#define MATRIX_ROWS 5
-#define MATRIX_COLS 4
-
 /* key matrix pins */
 #define MATRIX_ROW_PINS { B6, F6, D0, D4, C6 }
 #define MATRIX_COL_PINS { B2, D1, D2, D3 }