lib: remove redundant branch in async_hooks
The if-else is check if e.stack is string according to Node.js docs, e.stack is always a string, so there is no need for this check
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
The if-else is check if e.stack is string according to Node.js docs, e.stack is always a string, so there is no need for this check