Remove matrix size defines (#19581)

keyboards/projectkb/signature87/config.h

@@ -17,10 +17,6 @@ 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
-
 //                         0   1     2    3    4   5    6   7   8   9    A   B
 #define MATRIX_COL_PINS { A7,  A6,  A5,  A4,  A3, A2, A15, B3, B4 }
 #define MATRIX_ROW_PINS { B13, B12, A8, B15, A10, A9, B9,  B8, B1, B0, B10, B2 }