doc: remove remaining SSL_OP_NETSCAPE_*_BUG

I missed these two in db81af6 because I
went by OpenSSL's list of obsolete flags, which turned out to be
incomplete. See openssl/openssl#20443.

Refs: nodejs#46954
Refs: openssl/openssl#20443
PR-URL: nodejs#47066
Reviewed-By: Filip Skokan <panva.ip@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>

doc/api/crypto.md

@@ -5833,14 +5833,6 @@ See the [list of SSL OP Flags][] for details.
     <td><code>SSL_OP_LEGACY_SERVER_CONNECT</code></td>
     <td>Allows initial connection to servers that do not support RI.</td>
   </tr>
-  <tr>
-    <td><code>SSL_OP_NETSCAPE_CA_DN_BUG</code></td>
-    <td></td>
-  </tr>
-  <tr>
-    <td><code>SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG</code></td>
-    <td></td>
-  </tr>
   <tr>
     <td><code>SSL_OP_NO_COMPRESSION</code></td>
     <td>Instructs OpenSSL to disable support for SSL/TLS compression.</td>