QtSupport: Remove unneeded ~ExampleItem()

Change-Id: I61726c12b7afd4072612ea7e75587bb8ff60c9ef
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/qtsupport/exampleslistmodel.h

@@ -103,8 +103,6 @@ enum InstructionalType
 class ExampleItem : public Core::ListItem
 {
 public:
-    ~ExampleItem() override {}
-
     QString projectPath;
     QString docUrl;
     QStringList filesToOpen;