QmlDesigner: Remove qml2puppet test file

Task-number: QTCREATORBUG-10449
Change-Id: Ied72268910bc2312c3d293da0ef38c1ff8b72fc4
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>