RFR: JDK-8253879: Simplify redundant code in IndexBuilder

[Kumar Srinivasan]

On Thu, 1 Oct 2020 22:42:02 GMT, Kumar Srinivasan <ksrini at openjdk.org> wrote:

>> Trivial cleanup to simplify `configuration.utils` to just `utils`, removing the redundant `configuration.`
>
> Marked as reviewed by ksrini (Reviewer).

Looks good. It looks like you are hitting all my favorite files. ��

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PR: https://git.openjdk.java.net/jdk/pull/445