simplify roughness setting

GUI/Model/FromCore/ItemizeSample.cpp

@@ -292,13 +292,6 @@ bool isValidBasicRoughness(const LayerRoughness* roughness)
     return true;
 }
 
-void set_BasicRoughnessItem(BasicRoughnessItem* parent, const LayerRoughness& sample)
-{
-    parent->setSigma(sample.sigma());
-    parent->setHurst(sample.hurst());
-    parent->setLateralCorrelationLength(sample.lateralCorrLength());
-}
-
 void set_LayerItem(LayerItem* parent, const Layer* layer, const LayerInterface* top_interface)
 {
     parent->setThickness(layer->thickness());
@@ -309,8 +302,10 @@ void set_LayerItem(LayerItem* parent, const Layer* layer, const LayerInterface*
         const LayerRoughness* roughness = top_interface->roughness();
         if (isValidBasicRoughness(roughness)) {
             auto* t = new BasicRoughnessItem;
+            t->setSigma(roughness->sigma());
+            t->setHurst(roughness->hurst());
+            t->setLateralCorrelationLength(roughness->lateralCorrLength());
             parent->roughnessSelection().setCertainItem(t);
-            set_BasicRoughnessItem(t, *roughness);
         }
     }
 }