InfoBar: Avoid using sender()

Change-Id: I575aa4999b4cb8d39135880a3bc6d1b2fe44cf4a
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/libs/utils/infobar.cpp

@@ -402,15 +402,12 @@ void InfoBarDisplay::update()
                 hbox->addWidget(infoWidgetSuppressButton);
         }
 
-        connect(infoWidget, &QObject::destroyed, this, &InfoBarDisplay::widgetDestroyed);
+        connect(infoWidget, &QObject::destroyed, this, [this, infoWidget] {
+            m_infoWidgets.removeOne(infoWidget);
+        });
         m_boxLayout->insertWidget(m_boxIndex, infoWidget);
         m_infoWidgets << infoWidget;
     }
 }
 
-void InfoBarDisplay::widgetDestroyed()
-{
-    m_infoWidgets.removeOne(static_cast<QWidget *>(sender()));
-}
-
 } // namespace Utils

src/libs/utils/infobar.h

@@ -158,7 +158,6 @@ public:
 private:
     void update();
     void infoBarDestroyed();
-    void widgetDestroyed();
 
     QList<QWidget *> m_infoWidgets;
     InfoBar *m_infoBar = nullptr;