First, the entire scouring of The Shire was cut from the film altogether, you won’t get to see that at all. The Saruman section that was cut I believe is derived from the bit where Gandalf casts him out of Isenguard. Because there’s no scouring, I think that what happens is Wormtongue kills Saruman near the beginning of the film, along with an explanation of how the palintir ends up outside. It’s a 7 minute section, so it’s not a small cut by any means.