tools: remove custom buffer-constructor lint rule

This rule is no longer needed. ESLint's built in
no-buffer-constructor rule is enabled instead.

PR-URL: https://github.com/nodejs/node/pull/25261


Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>