src: remove unused INT_MAX constant

Node doesn't use it, and its not documented. Remove it.

PR-URL: https://github.com/nodejs/node/pull/27078


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>