rm unnecessary base class

GUI/View/Main/PyImportAssistant.h

@@ -25,8 +25,8 @@ class MultiLayer;
 
 //! Assists in importing Python object to GUI models.
 
-class PyImportAssistant : public QObject {
-    Q_OBJECT
+class PyImportAssistant {
+
 public:
     PyImportAssistant(QWidget* parentForDialogs, ProjectDocument* document);