Remove matrix size defines (#19581)

keyboards/acheron/arctic/config.h

@@ -17,10 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* key matrix size */
-#define MATRIX_ROWS 5
-#define MATRIX_COLS 14
-
 #define MATRIX_COL_PINS { B0, A5, A4, A3, A2, A1, A0, F1, F0, C15, C14, C13, B9, B8}
 #define MATRIX_ROW_PINS { B7, B6, A6, A7, B1}
 #define DIODE_DIRECTION COL2ROW