RFR: 8297561: Redundant index check in String.offsetByCodePoints() [v4]

[Claes Redestad]

On Thu, 1 Dec 2022 08:14:07 GMT, Sergey Tsypanov <stsypanov at openjdk.org> wrote:

>> `String.offsetByCodePoints()` delegates to `Character.offsetByCodePoints()` which in turn specifies the same exception thrown under the same conditions and the implementation does exactly the same checks. This means we can remove the check from `String.offsetByCodePoints()` and rely on the one of `Character.offsetByCodePoints()`.
>
> Sergey Tsypanov has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - 8297561: Minor clean-up
>  - 8297561: Fix copyright year

Marked as reviewed by redestad (Reviewer).

-------------

PR: https://git.openjdk.org/jdk/pull/11350