Remove matrix size defines (#19581)

keyboards/handwired/6macro/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 2
-#define MATRIX_COLS 3
-
 /* pinout - DON'T CHANGE */
 #define MATRIX_ROW_PINS { B3, B4 }
 #define MATRIX_COL_PINS { B0, B1, B2 }