Remove obsolete "Smartcard support" message

The configure checks that populated $SCARD_MSG were removed in commits
7ea845e4 and d8f60022 when the smartcard support was replaced with
PKCS#11.

configure.ac

@@ -5120,7 +5120,6 @@ echo "                       PAM support: $PAM_MSG"
 echo "                   OSF SIA support: $SIA_MSG"
 echo "                 KerberosV support: $KRB5_MSG"
 echo "                   SELinux support: $SELINUX_MSG"
-echo "                 Smartcard support: $SCARD_MSG"
 echo "                     S/KEY support: $SKEY_MSG"
 echo "              MD5 password support: $MD5_MSG"
 echo "                   libedit support: $LIBEDIT_MSG"