Remove quantum.h includes from keyboard custom matrix.cs (#23371)

keyboards/planck/rev6_drop/matrix.c

@@ -15,7 +15,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "quantum.h"
+#include "matrix.h"
+#include "wait.h"
 
 /* matrix state(1:on, 0:off) */
 static pin_t matrix_row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;

keyboards/planck/rev7/matrix.c

@@ -15,11 +15,10 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "gpio.h"
-#include "hal_pal.h"
-#include "hal_pal_lld.h"
-#include "quantum.h"
+#include "matrix.h"
+#include <hal_pal.h>
 #include <math.h>
+#include "wait.h"
 
 // STM32-specific watchdog config calculations
 // timeout = 31.25us * PR * (RL + 1)