RFR: 8291895: Remove PRAGMA_NONNULL_IGNORED from x86 and AArch64

[Andrew Haley]

On Thu, 4 Aug 2022 10:52:27 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Nice.
> 
> `PRAGMA_DIAG_POP` should be removed along with `PRAGMA_DIAG_PUSH`. See how Windows/MSVC builds complain about it. This probably warrants retesting on GCCs.

LOL! I never even noticed them.  :-)

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PR: https://git.openjdk.org/jdk/pull/9742