RFR: 8256379: Replace SIZE_FORMAT with 'z' length modifier

[David Holmes]

On Thu, 3 Aug 2023 23:39:11 GMT, Andrew John Hughes <andrew at openjdk.org> wrote:

> Removing it to hardcode a format thus seems like a bit of a backward step to me.

But we only defined abstract things like `SIZE_FORMAT` because there was no single specifier accepted by all C runtimes and which behaves in the same (or similar enough) way. Once we have use of `%zu` or %zd`  available everywhere then we no longer need the abstraction.

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PR Comment: https://git.openjdk.org/jdk/pull/15115#issuecomment-1665059059