fixup hir

Author: camsteffen

compiler/rustc_ty_utils/src/ty.rs

@@ -84,7 +84,7 @@ fn defaultness(tcx: TyCtxt<'_>, def_id: LocalDefId) -> hir::Defaultness {
             kind: hir::ItemKind::Impl(hir::Impl { of_trait: Some(of_trait), .. }),
             ..
         }) => of_trait.defaultness,
-        hir::Node::ImplItem(hir::ImplItem { defaultness, of_trait: Some(_), .. })
+        hir::Node::ImplItem(hir::ImplItem { defaultness, .. })
         | hir::Node::TraitItem(hir::TraitItem { defaultness, .. }) => *defaultness,
         node => {
             bug!("`defaultness` called on {:?}", node);