Tidy up configure before 4.6 release

// ### This should be removed once Qt for S60 is out.
static void applyTemporarySymbianFlags(QStringList &qconfigList)
 {
     qconfigList += "QT_NO_CONCURRENT";
     qconfigList += "QT_NO_QFUTURE";
     // This is removed because it uses UNIX signals which are not implemented yet
     qconfigList += "QT_NO_CRASHHANDLER";
     qconfigList += "QT_NO_PRINTER";
     qconfigList += "QT_NO_SYSTEMTRAYICON";
 }