RFR: 8303253: Remove unnecessary calls to super() in java.time value based classes

[Naoto Sato]

On Mon, 27 Feb 2023 15:50:02 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> To simplify future work changing some java.time value based classes to Valhalla value classes, the explicit calls to super() are removed from Duration, Instant, and ZoneOffset.

LGTM

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Marked as reviewed by naoto (Reviewer).

PR: https://git.openjdk.org/jdk/pull/12771