[foreign-abi] RFR: 8250798: [Test] Cleanup @modules jtreg directives for jdk_foreign tests

[Athijegannathan Sundararajan]

On Wed, 29 Jul 2020 19:30:43 GMT, Henry Jen <henryjen at openjdk.org> wrote:

> @module jdk.incubator.foreign is not needed as that's specified in test/jdk/java/foreign/TEST.properties.
> Remove directives to export unused internal API.

Marked as reviewed by sundar (Committer).

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PR: https://git.openjdk.java.net/panama-foreign/pull/274