No Trelawney in HBP

[Carol]

Apparently, Trelawney's not going to be in HBP. 

http://harrypotterspage.com/news.php/2008/05/30/no-trelawney-in-the-half-blood-prince-film123.html

I suppose that Harry rather than Trelqwney will hear Draco whooping in
the RoR, but there won't be any predictions of the lightning-struck
tower--and who's going to tell Harry that Snape was the eavesdropper?
Dumbledore? Why would he do that? Trelawney's accidental revelation
may be a small scene but it's essential!

Then, again, the makers of the OoP film left out the information that
Snape sent the Order to the MoM and they had Harry hear part of the
Prophecy directly from the orb, so I should have known better to
expect faithfulness to the book in Prophecy-related matterss. How
they're going to work in Snape's request to LV to save Lily ("the
Prince's Tale") and make it's importance clear under these
circumstances, I can't guess. Don't they know diamonds from dross? I
guess not!

Carol, whose hopes for the film were up briefly but have been dashed again