doc: Get rid of unrelated reference to DSA_new()
doc: Get rid of unrelated reference to DSA_new()

CLA: trivial

Signed-off-by: Jakub Jelen <jjelen@redhat.com>

Reviewed-by: Paul Yang <cad61ddf4788d12607a026a313663800394626e7@baishancloud.com>
Reviewed-by: Richard Levitte <5fb523282dd7956571c80524edc2dccfa0bd8234@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8786)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl