QtVersionManager et al: Code cosmetics

Apply static 'pattern' for QtVersionManager, de-noise using code.

Change-Id: Id66ac90094cd7312d1e72abbdbce4c02b078456e
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/qt4projectmanager/qt4buildconfiguration.cpp

@@ -509,8 +509,8 @@ Qt4BuildConfigurationFactory::Qt4BuildConfigurationFactory(QObject *parent) :
 {
     update();
 
-    QtVersionManager *vm = QtVersionManager::instance();
-    connect(vm, SIGNAL(qtVersionsChanged(QList<int>,QList<int>,QList<int>)),
+    connect(QtVersionManager::instance(),
+            SIGNAL(qtVersionsChanged(QList<int>,QList<int>,QList<int>)),
             this, SLOT(update()));
 }