Move encoder_read to common location (#9003)

quantum/split_common/matrix.c

@@ -24,10 +24,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "config.h"
 #include "transport.h"
 
-#ifdef ENCODER_ENABLE
-#    include "encoder.h"
-#endif
-
 #define ERROR_DISCONNECT_COUNT 5
 
 #define ROWS_PER_HAND (MATRIX_ROWS / 2)
@@ -264,9 +260,7 @@ void matrix_post_scan(void) {
         matrix_scan_quantum();
     } else {
         transport_slave(matrix + thisHand);
-#ifdef ENCODER_ENABLE
-        encoder_read();
-#endif
+
         matrix_slave_scan_user();
     }
 }