doc: remove "is recommended from crypto legacy API text

The text for the legacy API sends mixed signals. It's legacy, but still
supported, so not deprecated, but not recommended. Let's begin to
clarify this by removing "not recommended". If we want to not-recommend
it, let's doc-deprecate it properly, or at least include an explanation
as to why it's not recommended.

PR-URL: #34697
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ujjwal Sharma <ryzokuken@disroot.org>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

doc/api/crypto.md

@@ -106,9 +106,8 @@ console.log(Certificate.verifySpkac(Buffer.from(spkac)));
 
 ### Legacy API
 
-As a still supported legacy interface, it is possible (but not recommended) to
-create new instances of the `crypto.Certificate` class as illustrated in the
-examples below.
+As a still supported legacy interface, it is possible to create new instances of
+the `crypto.Certificate` class as illustrated in the examples below.
 
 #### `new crypto.Certificate()`