RFR: 8301244: Tidy up compiler specific warnings files [v8]

[Julian Waters]

On Wed, 1 Feb 2023 07:46:06 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Julian Waters has updated the pull request incrementally with four additional commits since the last revision:
>> 
>>  - gcc
>>  - VISCPP
>>  - Comment
>>  - Re-add PRAGMA
>
> So can I assume you have some uses for this in the pipeline?

Thanks Kim, waiting for a second reviewer (@dholmes-ora perhaps?)

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PR: https://git.openjdk.org/jdk/pull/12255