use crate::attr;
use crate::ast;
use crate::edition::Edition;
-use crate::errors::Applicability;
use crate::mut_visit::*;
use crate::parse::{token, ParseSess};
use crate::ptr::P;
use crate::util::map_in_place::MapInPlace;
+use errors::Applicability;
use smallvec::SmallVec;
/// A folder that strips out items that do not belong in the current configuration.