Instead of removing the NoneEnabled option, mark it as unsupported.

(should have done this in r291198, but didn't think of it until now)

crypto/openssh/servconf.c

@@ -565,6 +565,7 @@ static struct {
 	{ "streamlocalbindunlink", sStreamLocalBindUnlink, SSHCFG_ALL },
 	{ "allowstreamlocalforwarding", sAllowStreamLocalForwarding, SSHCFG_ALL },
 	{ "fingerprinthash", sFingerprintHash, SSHCFG_GLOBAL },
+	{ "noneenabled", sUnsupported, SSHCFG_ALL },
 	{ "hpndisabled", sDeprecated, SSHCFG_ALL },
 	{ "hpnbuffersize", sDeprecated, SSHCFG_ALL },
 	{ "tcprcvbufpoll", sDeprecated, SSHCFG_ALL },