Fixup BIO demos for OpenSSL 1.1.x

'ECDHParameters = Automatic' isn't accepted.

Reviewed-by: Rich Salz <rsalz@openssl.org>
diff --git a/demos/bio/accept.cnf b/demos/bio/accept.cnf
index 5a2ef45..eb69658 100644
--- a/demos/bio/accept.cnf
+++ b/demos/bio/accept.cnf
@@ -5,8 +5,6 @@
 # Protocol = ALL, -TLSv1.2
 # Only support 3 curves
 Curves = P-521:P-384:P-256
-# Automatic curve selection
-ECDHParameters = Automatic
 # Restricted signature algorithms
 SignatureAlgorithms = RSA+SHA512:ECDSA+SHA512 
 Certificate=server.pem