Nahh they didn't leave it out of the film but rather the initial memory did not mention it so Harry had to find out what Slughorn and Riddle were talking bout rather then ask Slughorn "What do you know about Horcruxes?". Over complicated something very simple.
I think because that's how Deathly Hallows end's in a similar fight so they didn't want to finish two films with the same type of fight at Hogwarts which is a shame as the Burrow scene was an insult to the book's. Personally, I’ve read HBP 15+ times (I know) and the only real similarity between...
i will make it good. :)
i've had one girlfried in my life....very sad....and that lasted approx. 2 hours, cut up for about 2 months......cruel life :burn: