Remove matrix size defines (#19581)

keyboards/mechwild/mercutio/config.h

@@ -18,10 +18,6 @@
 #pragma once
 
 
-/* key matrix size */
-#define MATRIX_ROWS 7
-#define MATRIX_COLS 7
-
 /* key matrix pins */
 #define MATRIX_ROW_PINS { D0, D1, D4, C3, C0, C1, C2}
 #define MATRIX_COL_PINS { B0, D7, D6, D5, B1, B2, B3}