Remove matrix size defines (#19581)

keyboards/cosmo65/config.h

@@ -28,10 +28,6 @@ along with this program.  If not, see http://www.gnu.org/licenses/.
 #define RGBLIGHT_EFFECT_RGB_TEST
 #define RGBLIGHT_EFFECT_ALTERNATING
 
-/* key matrix size */
-#define MATRIX_ROWS 5
-#define MATRIX_COLS 14
-
 /* keyboard matrix assignments */
 #define MATRIX_ROW_PINS { D5, D0, F0, F5, F4 }
 #define MATRIX_COL_PINS { E6, D4, D6, D7, B4, B5, B6, C6, C7, D1, D2, D3, F1, F6 }