Revert "build,tools: check freshness of doc addons"

This reverts commit 2cb9e2a6.

Reverted along with d9b59def as this introduces freshness checks that
are too stringent without the comprehensive dependency checking of
introduced in d9b59def so `make test` won't work with this.

Ref: https://github.com/nodejs/node/pull/17407
PR-URL: https://github.com/nodejs/node/pull/18287


Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>