test: remove workaround for unsupported OpenSSLs

Workaround added in d9b9229d is no longer needed, since OpenSSL
versions lower than 1.1.1 are unsupported.

PR-URL: https://github.com/nodejs/node/pull/28085


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>