Don't need that layer of indirection

(it was accidentally not removed when this code was refactored)

implementation/Model01Beta.cpp

@@ -44,18 +44,18 @@ void Model01Beta_::led_sync() {
 void Model01Beta_::scan_matrix() {
     //scan the Keyboard matrix looking for connections
     for (byte row = 0; row < LEFT_ROWS; row++) {
-        KeyboardHardware.scan_row(row);
+        scan_row(row);
 
         for (byte col = 0; col < LEFT_COLS; col++) {
-            KeyboardHardware.scan_left_col(row,col,&matrixState[row][col]);
+            scan_left_col(row,col,&matrixState[row][col]);
             handle_key_event(row, col);
 
-            if (KeyboardHardware.right_hand_connected()) {
-                KeyboardHardware.scan_right_col(row,col,&matrixState[row][(COLS - 1) - col]);
+            if (right_hand_connected()) {
+                scan_right_col(row,col,&matrixState[row][(COLS - 1) - col]);
                 handle_key_event(row, (COLS - 1) - col);
             }
         }
-        KeyboardHardware.finish_scanning_row(row);
+        finish_scanning_row(row);
     }
 }