RFR: 8258192: Obsolete the CriticalJNINatives flag [v2]

[Martin Doerr]

On Thu, 11 Nov 2021 16:19:01 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> This change removes the disabled CriticalJNINatives code, and the flag now gives an obsolete message.
>> Tested with tier1 on cpus x64, aarch64, and builds on linux-x86-open,linux-s390x-open,linux-arm32-debug,linux-ppc64le-debug.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Some platform adjustments.

LGTM. Thanks!

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Marked as reviewed by mdoerr (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6343