WelcomeScreen: remove obsolete stub file

Change-Id: Ie3ddcfa3a5b96bed9023d8b4cbbe567d465ee57d
Reviewed-on: http://codereview.qt.nokia.com/919


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Daniel Molkentin <daniel.molkentin@nokia.com>

share/qtcreator/welcomescreen/newssupport.qml

-import QtQuick 1.0
-
-Rectangle {
-    width: 200; height: 200
-    color: "blue"
-}
-