In that case, it's a BrE/AmE difference. "doesn't need in" doesn't work in BrE.
I expected something like these:
I hope she doesn't need anything in that closet ...
I hope she doesn't need what's in that closet ...
I hope she doesn't to get in that closet ...
Yes, in AmE 'need in' means something like 'need/want access to'.
For example, if I'm waiting on somebody to exit the restroom, I might say something like "Hurry up, I need in there!" , or "I need in the storage room, but it's locked."
It can of course be negated. I might respond to someone by telling them to go ahead and close up the safe because I don't need in it.