Remove unused hir_id arg from visit_attribute.

compiler/rustc_hir/src/intravisit.rs

@@ -466,7 +466,7 @@ pub trait Visitor<'v>: Sized {
     fn visit_assoc_type_binding(&mut self, type_binding: &'v TypeBinding<'v>) {
         walk_assoc_type_binding(self, type_binding)
     }
-    fn visit_attribute(&mut self, _id: HirId, _attr: &'v Attribute) {}
+    fn visit_attribute(&mut self, _attr: &'v Attribute) {}
     fn visit_associated_item_kind(&mut self, kind: &'v AssocItemKind) {
         walk_associated_item_kind(self, kind);
     }

compiler/rustc_incremental/src/persist/dirty_clean.rs

@@ -21,7 +21,6 @@
 
 use rustc_ast::{self as ast, Attribute, NestedMetaItem};
 use rustc_data_structures::fx::FxHashSet;
-use rustc_hir as hir;
 use rustc_hir::def_id::LocalDefId;
 use rustc_hir::intravisit;
 use rustc_hir::Node as HirNode;
@@ -473,7 +472,7 @@ impl<'tcx> intravisit::Visitor<'tcx> for FindAllAttrs<'tcx> {
         self.tcx.hir()
     }
 
-    fn visit_attribute(&mut self, _: hir::HirId, attr: &'tcx Attribute) {
+    fn visit_attribute(&mut self, attr: &'tcx Attribute) {
         if self.is_active_attr(attr) {
             self.found_attrs.push(attr);
         }

compiler/rustc_lint/src/late.rs

@@ -337,7 +337,7 @@ impl<'tcx, T: LateLintPass<'tcx>> hir_visit::Visitor<'tcx> for LateContextAndPas
         hir_visit::walk_path(self, p);
     }
 
-    fn visit_attribute(&mut self, _hir_id: hir::HirId, attr: &'tcx ast::Attribute) {
+    fn visit_attribute(&mut self, attr: &'tcx ast::Attribute) {
         lint_callback!(self, check_attribute, attr);
     }
 }
@@ -400,7 +400,7 @@ fn late_lint_mod_pass<'tcx, T: LateLintPass<'tcx>>(
     // Visit the crate attributes
     if hir_id == hir::CRATE_HIR_ID {
         for attr in tcx.hir().attrs(hir::CRATE_HIR_ID).iter() {
-            cx.visit_attribute(hir_id, attr)
+            cx.visit_attribute(attr)
         }
     }
 }

compiler/rustc_middle/src/hir/map/mod.rs

@@ -577,12 +577,11 @@ impl<'hir> Map<'hir> {
     /// Walks the attributes in a crate.
     pub fn walk_attributes(self, visitor: &mut impl Visitor<'hir>) {
         let krate = self.krate();
-        for (owner, info) in krate.owners.iter_enumerated() {
+        for info in krate.owners.iter() {
             if let MaybeOwner::Owner(info) = info {
-                for (local_id, attrs) in info.attrs.map.iter() {
-                    let id = HirId { owner, local_id: *local_id };
+                for attrs in info.attrs.map.values() {
                     for a in *attrs {
-                        visitor.visit_attribute(id, a)
+                        visitor.visit_attribute(a)
                     }
                 }
             }

compiler/rustc_passes/src/hir_stats.rs

@@ -238,7 +238,7 @@ impl<'v> hir_visit::Visitor<'v> for StatCollector<'v> {
         hir_visit::walk_assoc_type_binding(self, type_binding)
     }
 
-    fn visit_attribute(&mut self, _: hir::HirId, attr: &'v ast::Attribute) {
+    fn visit_attribute(&mut self, attr: &'v ast::Attribute) {
         self.record("Attribute", Id::Attr(attr.id), attr);
     }
 }

compiler/rustc_passes/src/lib_features.rs

@@ -120,7 +120,7 @@ impl<'tcx> Visitor<'tcx> for LibFeatureCollector<'tcx> {
         self.tcx.hir()
     }
 
-    fn visit_attribute(&mut self, _: rustc_hir::HirId, attr: &'tcx Attribute) {
+    fn visit_attribute(&mut self, attr: &'tcx Attribute) {
         if let Some((feature, stable, span)) = self.extract(attr) {
             self.collect_feature(feature, stable, span);
         }