Remove matrix size defines (#19581)

keyboards/handwired/dactyl_manuform/4x6/config.h

@@ -19,11 +19,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 
-/* key matrix size */
-// Rows are doubled-up
-#define MATRIX_ROWS 10
-#define MATRIX_COLS 6
-
 // row-driven
 #define MATRIX_ROW_PINS { F7, B1, B3, B2, B6 }
 #define MATRIX_COL_PINS { D4, C6, D7, E6, B4, B5 }