These are deprecated according to RFC4880 and should no longer be generated: https://tools.ietf.org/html/rfc4880#section-13.5 With that, the notion of a "sign-only" private key doesn't make sense (as that is a signature property, not a private key property), so remove it from the comment. Fixes golang/go#27888 Change-Id: I7d41acd0793b2caf3c0897e580f42375c72d82a8 Reviewed-on: https://go-review.googlesource.com/c/137896 Reviewed-by: Filippo Valsorda <filippo@golang.org> Run-TryBot: Filippo Valsorda <filippo@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>