I agree that some comments in the first example are unnecessary, e.g. the one pointed out in [0], but I find comments like that at worst useless, but not harmful. They have a potential to become harmful if someone updates the code but doesn't bother to update the comment, but I can't see how it takes away the ability to scan the code.
[0]: https://news.ycombinator.com/item?id=28416777