Remove matrix size defines (#19581)

keyboards/obosob/arch_36/config.h

@@ -17,11 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-/* key matrix size */
-/* Rows are doubled up */
-#define MATRIX_ROWS 8
-#define MATRIX_COLS 5
-
 // wiring
 #define MATRIX_ROW_PINS { D7, E6, B4, B5 }
 #define MATRIX_COL_PINS { F7, B1, B3, B2, B6 }