Gather module items after lowering.

compiler/rustc_hir/src/hir.rs

@@ -21,7 +21,7 @@ use rustc_target::asm::InlineAsmRegOrRegClass;
 use rustc_target::spec::abi::Abi;
 
 use smallvec::SmallVec;
-use std::collections::{BTreeMap, BTreeSet};
+use std::collections::BTreeMap;
 use std::fmt;
 
 #[derive(Copy, Clone, Encodable, HashStable_Generic)]
@@ -653,16 +653,6 @@ pub struct WhereEqPredicate<'hir> {
     pub rhs_ty: &'hir Ty<'hir>,
 }
 
-#[derive(Default, Encodable, Debug, HashStable_Generic)]
-pub struct ModuleItems {
-    // Use BTreeSets here so items are in the same order as in the
-    // list of all items in Crate
-    pub items: BTreeSet<ItemId>,
-    pub trait_items: BTreeSet<TraitItemId>,
-    pub impl_items: BTreeSet<ImplItemId>,
-    pub foreign_items: BTreeSet<ForeignItemId>,
-}
-
 /// The top-level data structure that stores the entire contents of
 /// the crate currently being compiled.
 ///
@@ -674,10 +664,6 @@ pub struct Crate<'hir> {
     pub owners: IndexVec<LocalDefId, Option<OwnerNode<'hir>>>,
     pub bodies: BTreeMap<BodyId, Body<'hir>>,
 
-    /// A list of modules written out in the order in which they
-    /// appear in the crate. This includes the main crate module.
-    pub modules: BTreeMap<LocalDefId, ModuleItems>,
-
     /// Map indicating what traits are in scope for places where this
     /// is relevant; generated by resolve.
     pub trait_map: FxHashMap<LocalDefId, FxHashMap<ItemLocalId, Box<[TraitCandidate]>>>,