doc: remove "idiomatic choice" from queueMicrotask

It can't be idiomatic if it's not in general use and therefore hasn't
been picked up by users. It's not even in browsers yet.

"Idiomatic" use is an emergent property that comes from observed use
and this feature is so new (to browsers and Node) that it can't
possibly be. In general I don't think it's the place of the Node API
docs to observe what emerges as idiomatic Node.js.

It also can't be a recommended feature (if that was the intent of the
language) because it's marked experimental. For now, it's just a
feature, nothing more. Recommendations and/or observations about it
being 'idiomatic' can come later.

PR-URL: https://github.com/nodejs/node/pull/23885


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>
Reviewed-By: Matheus Marchini <mat@mmarchini.me>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>