rm onDestroyed handling

GUI/View/Access/DataAccessWidget.cpp

@@ -28,9 +28,6 @@ void DataAccessWidget::setBaseItem(QObject* item)
 {
     m_item = item;
     ASSERT(jobxItem() || realDataItem());
-
-    disconnect(m_item, &QObject::destroyed, this, nullptr);
-    connect(m_item, &QObject::destroyed, [this] { m_item = nullptr; });
 }
 
 JobItem* DataAccessWidget::jobxItem() const

GUI/View/Access/DataAccessWidget.h

@@ -27,8 +27,7 @@ class JobItem;
 //! separately and as a list of items that is required for simultaneous, synchronous work while
 //! plotting and changing their properties.
 
-class DataAccessWidget : public QObject {
-    Q_OBJECT
+class DataAccessWidget {
 public:
     explicit DataAccessWidget();