COMP: ctkVTKDataSetArrayComboBox: Fix unused variable warnings

Libs/Visualization/VTK/Widgets/ctkVTKDataSetArrayComboBox.cpp

@@ -171,14 +171,12 @@ void ctkVTKDataSetArrayComboBox::setAttributeTypes(const ctkVTKDataSetModel::Att
 // ----------------------------------------------------------------------------
 bool ctkVTKDataSetArrayComboBox::noneEnabled()const
 {
-  Q_D(const ctkVTKDataSetArrayComboBox);
   return this->dataSetModel()->includeNullItem();
 }
 
 // ----------------------------------------------------------------------------
 void ctkVTKDataSetArrayComboBox::setNoneEnabled(bool noneEnabled)
 {
-  Q_D(ctkVTKDataSetArrayComboBox);
   return this->dataSetModel()->setIncludeNullItem(noneEnabled);
 }