RFR: 8254096: remove jdk.test.lib.Utils::getMandatoryProperty(String) method

[Aleksey Shipilev]

On Tue, 6 Oct 2020 20:54:50 GMT, Igor Ignatyev <iignatyev at openjdk.org> wrote:

> Hi all,
> 
> could you please review this small and trivial cleanup that removes `getMandatoryProperty` method from
> `jdk.test.lib.Utils` as it's unused?
> Thanks,
> -- Igor

Marked as reviewed by shade (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/533