doc: remove uannecessary Require

This was the only instance were we said a parameter
was required.  It is assumed parameters are required unless
the doc says they are option.  Remove `Required` to make
consistent with the rest of the doc

PR-URL: https://github.com/nodejs/node/pull/18184


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com>