Stop visiting visibility.

clippy_utils/src/lib.rs

@@ -1690,7 +1690,7 @@ pub fn if_sequence<'tcx>(mut expr: &'tcx Expr<'tcx>) -> (Vec<&'tcx Expr<'tcx>>,
 
 /// Checks if the given function kind is an async function.
 pub fn is_async_fn(kind: FnKind<'_>) -> bool {
-    matches!(kind, FnKind::ItemFn(_, _, header, _) if header.asyncness == IsAsync::Async)
+    matches!(kind, FnKind::ItemFn(_, _, header) if header.asyncness == IsAsync::Async)
 }
 
 /// Peels away all the compiler generated code surrounding the body of an async function,