Remove AttributeDuplicates from BUILTIN_ATTRIBUTES

clippy_lints/src/cognitive_complexity.rs

@@ -145,7 +145,7 @@ fn check_fn(
         def_id: LocalDefId,
     ) {
         #[allow(deprecated)]
-        if !cx.tcx.has_attr(def_id, sym::test) {
+        if !cx.tcx.get_attrs(def_id, sym::test).next().is_some() {
             let expr = if kind.asyncness().is_async() {
                 match get_async_fn_body(cx.tcx, body) {
                     Some(b) => b,

clippy_utils/src/lib.rs

@@ -2400,8 +2400,7 @@ pub fn is_hir_ty_cfg_dependant(cx: &LateContext<'_>, ty: &hir::Ty<'_>) -> bool {
     if let TyKind::Path(QPath::Resolved(_, path)) = ty.kind
         && let Res::Def(_, def_id) = path.res
     {
-        #[allow(deprecated)]
-        return cx.tcx.has_attr(def_id, sym::cfg) || cx.tcx.has_attr(def_id, sym::cfg_attr);
+        return find_attr!(cx.tcx, def_id, CfgTrace(..) | CfgAttrTrace);
     }
     false
 }