DFly override for qt-libs no longer needed

[walt]

I set out to see if I could update the DFly port override for the
qt libraries and I was pleasantly shocked to find that someone
upstream has already done it!
To try it out, just rename the qt33 directory in the dfports
tree and portupgrade should finish without error by using
the regular FreeBSD port.
One more bit of evidence that the DFly project is making a
name for itself.  Congrats!