REPORT-96204 根据pr建议优化代码

designer-chart/src/main/java/com/fr/van/chart/map/designer/type/GisLayerPane.java

@@ -287,7 +287,6 @@ public class GisLayerPane extends JPanel implements UIObserver {
         gisButton.setSelectedIndex(1);
         String layerName = layer.getLayerName();
         if (layer.getGisLayerType() == GISLayerType.LAYER_NULL) {
-            layer.setGisLayerType(GISLayerType.LAYER_NULL);
             standardLayers.setSelectedIndex(standardLayers.getItemCount() - 1);
         } else {
             if(Locale.CHINA.equals(GeneralContext.getLocale())) {