RFR: 8293630: Simplify TreeMap.get() with Comparator.naturalOrder()

[Сергей Цыпанов]

On Wed, 17 Aug 2022 11:23:57 GMT, Сергей Цыпанов <duke at openjdk.org> wrote:

> We can use `Comparator.naturalOrder()` for cases when a `TreeMap` instance is constructed without comparator. This allows to squash two branches in `TreeMap.get()` into one.
> 
> P.S. I think the comment of `TreeMap.getEntryUsingComparator()` is outdated. Should we also change it?

Let's wait

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PR: https://git.openjdk.org/jdk/pull/9901