Remove matrix size defines (#19581)

keyboards/handwired/swiftrax/beegboy/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 12
-#define MATRIX_COLS 9
-
 // ROWS: Top to bottom, COLS: Left to right
 
 #define MATRIX_ROW_PINS { B1, B0, B3, B2, D0, B7, D2, D1, B5, B4, C6, B6 }