Drop Qt5: Various plugins: Get rid of QOverload

Change-Id: I4913044f8897fd3449dbb537e4af6785eb3ad447
Reviewed-by: hjk <hjk@qt.io>

src/plugins/cmakeprojectmanager/cmakekitinformation.cpp

@@ -105,7 +105,7 @@ public:
 
         updateComboBox();
         refresh();
-        connect(m_comboBox, QOverload<int>::of(&QComboBox::currentIndexChanged),
+        connect(m_comboBox, &QComboBox::currentIndexChanged,
                 this, &CMakeKitAspectWidget::currentCMakeToolChanged);
 
         CMakeToolManager *cmakeMgr = CMakeToolManager::instance();