Terminal: Remove unnecessary destructor

Calling Aggregate::remove is not necessary and led to a warning message.

Change-Id: I51cdd7bfa9bdda7a3ebedf6a86e48fe54fd8f3ef
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/terminal/terminalwidget.h

@@ -29,7 +29,6 @@ class TerminalWidget : public QAbstractScrollArea
 public:
     TerminalWidget(QWidget *parent = nullptr,
                    const Utils::Terminal::OpenTerminalParameters &openParameters = {});
-    ~TerminalWidget() override;
 
     void setFont(const QFont &font);