Remove redudant updateDocumentation

Change-Id: I1967c5f1101dcbc1097c7fe6f26a195f658eab67
Reviewed-on: http://codereview.qt.nokia.com/1007
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/plugins/qtsupport/qtversionmanager.cpp

@@ -131,7 +131,6 @@ void QtVersionManager::extensionsInitialized()
         // and add it to the qt versions
         findSystemQt();
     }
-    updateDocumentation();
 
     updateSettings();
     saveQtVersions();