Fix doc-nits

Fix doc-nits

PR #19031 updated options that that were listed as commands, these
options were already in openssl-list.pod.in, so they are redundant
in openssl.pod.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19044)

(cherry picked from commit a148f864a86ba5f6999825dad9a98280bd054cbc)