Clean up lang_items::extract

Noted in https://github.com/rust-lang/rust/pull/87739#pullrequestreview-740497194,
lang_items::extract no longer needs to take a closure.

compiler/rustc_passes/src/weak_lang_items.rs

@@ -1,6 +1,5 @@
 //! Validity checking for weak lang items
 
-use rustc_ast::Attribute;
 use rustc_data_structures::fx::FxHashSet;
 use rustc_errors::struct_span_err;
 use rustc_hir as hir;
@@ -103,9 +102,8 @@ impl<'a, 'tcx, 'v> Visitor<'v> for Context<'a, 'tcx> {
     }
 
     fn visit_foreign_item(&mut self, i: &hir::ForeignItem<'_>) {
-        let check_name = |attr: &Attribute, sym| attr.has_name(sym);
         let attrs = self.tcx.hir().attrs(i.hir_id());
-        if let Some((lang_item, _)) = lang_items::extract(check_name, attrs) {
+        if let Some((lang_item, _)) = lang_items::extract(attrs) {
             self.register(lang_item, i.span);
         }
         intravisit::walk_foreign_item(self, i)