Remove matrix size defines (#19581)

keyboards/sneakbox/ava/config.h

@@ -23,10 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define ENCODERS_PAD_B { D2 }
 #define ENCODER_RESOLUTION 1
 
-/* key matrix size */
-#define MATRIX_ROWS 9
-#define MATRIX_COLS 8
-
 /* key matrix pins */
 #define MATRIX_ROW_PINS { F1, E6, F4, B1, F5, B2, F6, B3, B7 }
 #define MATRIX_COL_PINS { F0, D0, C7, C6, B6, B5, B4, D1 }