Remove matrix size defines (#19581)

keyboards/blaster75/config.h

@@ -18,10 +18,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #pragma once
 
 
-/* Matrix Size */
-#define MATRIX_ROWS 6
-#define MATRIX_COLS 15
-
 /* Matrix Pinouts */
 //                         0   1   2   3   4   5   6   7   8   9   A   B   C   D   E
 #define MATRIX_ROW_PINS { F0, F1, F4, F5, F6, F7 }