rm unused GUI::Util::Layout::placeHolder

GUI/View/Tool/LayoutUtil.cpp

@@ -115,10 +115,3 @@ void GUI::Util::Layout::clearGridLayout(QGridLayout* layout, bool deleteWidgets)
     for (int i_row = 0; i_row < layout->rowCount(); ++i_row)
         GUI::Util::Layout::removeRow(layout, i_row, deleteWidgets);
 }
-
-QWidget* GUI::Util::Layout::placeHolder()
-{
-    auto* result = new QWidget;
-    result->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-    return result;
-}

GUI/View/Tool/LayoutUtil.h

@@ -36,9 +36,6 @@ void removeColumn(QGridLayout* layout, int column, bool deleteWidgets = true);
 //! Clear layout completely.
 void clearGridLayout(QGridLayout* layout, bool deleteWidgets = true);
 
-//! Returns empty widget to occupy place in layout.
-QWidget* placeHolder();
-
 } // namespace GUI::Util::Layout
 
 #endif // BORNAGAIN_GUI_VIEW_TOOL_LAYOUTUTIL_H