src: remove unused GetHostByNameWrap

It was a wrapper for `ares_gethostbyname()` that I'm unsure about if
it was ever exposed at the binding layer, let alone the public API.

PR-URL: https://github.com/nodejs/node/pull/17860


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>