ProjectExplorer: Sprinkle overrides over the code

Sprinkle overrides over code derived from classes in ProjectExplorer

Change-Id: Ia4cc25649f7dc00b0ea126d8176a59afbc5ed574
Reviewed-by: hjk <hjk@theqtcompany.com>

src/plugins/qmakeprojectmanager/qmakebuildconfiguration.cpp

@@ -535,10 +535,6 @@ QmakeBuildConfigurationFactory::QmakeBuildConfigurationFactory(QObject *parent)
             this, &QmakeBuildConfigurationFactory::update);
 }
 
-QmakeBuildConfigurationFactory::~QmakeBuildConfigurationFactory()
-{
-}
-
 void QmakeBuildConfigurationFactory::update()
 {
     emit availableCreationIdsChanged();