test_owcsvimport: Remove create_widget override

Avoid possible double memory reclamation

Orange/widgets/data/tests/test_owcsvimport.py

@@ -35,23 +35,6 @@
 
 
 class TestOWCSVFileImport(WidgetTest):
-    def create_widget(
-            self, cls: Type[W], stored_settings: Optional[dict] = None,
-            reset_default_settings=True, **kwargs) -> W:
-        if reset_default_settings:
-            self.reset_default_settings(cls)
-        widget = cls.__new__(cls, signal_manager=self.signal_manager,
-                             stored_settings=stored_settings, **kwargs)
-        widget.__init__()
-
-        def delete():
-            widget.onDeleteWidget()
-            widget.close()
-            widget.deleteLater()
-
-        self._stack.callback(delete)
-        return widget
-
     def setUp(self):
         super().setUp()
         self._stack = ExitStack().__enter__()
@@ -293,6 +276,7 @@ def test_browse_for_missing(self):
         widget.activate_recent(0)
         dlg = widget.findChild(QFileDialog)
         assert dlg is not None
+        dlg.setParent(None)
         # calling selectFile when using native (macOS) dialog does not have
         # an effect - at least not immediately;
         dlg.setOption(QFileDialog.DontUseNativeDialog)
@@ -303,6 +287,7 @@ def test_browse_for_missing(self):
         self.assertEqual(
             self.data_regions_options.as_dict(), cur.options().as_dict()
         )
+        dlg.deleteLater()
 
     def test_browse_for_missing_prefixed(self):
         path = self.data_regions_path
@@ -349,6 +334,7 @@ def test_browse_for_missing_prefixed_parent(self):
         widget.activate_recent(0)
         dlg = widget.findChild(QFileDialog)
         assert dlg is not None
+        dlg.setParent(None)
         # calling selectFile when using native (macOS) dialog does not have
         # an effect - at least not immediately;
         dlg.setOption(QFileDialog.DontUseNativeDialog)
@@ -358,6 +344,7 @@ def test_browse_for_missing_prefixed_parent(self):
         cur = widget.current_item()
         self.assertEqual(item[0], cur.varPath())
         self.assertEqual(item[1].as_dict(), cur.options().as_dict())
+        dlg.deleteLater()
 
 
 class TestImportDialog(GuiTest):