hw/s390x/css: Remove double initialization

Fix eventual copy/paste mistake introduced in commit bc994b74ea
("s390x/css: Use static initialization for channel_subsys fields").

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20200907024020.854465-1-philmd@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

hw/s390x/css.c

@@ -353,7 +353,6 @@ static ChannelSubSys channel_subsys = {
     .pending_crws = QTAILQ_HEAD_INITIALIZER(channel_subsys.pending_crws),
     .do_crw_mchk = true,
     .sei_pending = false,
-    .do_crw_mchk = true,
     .crws_lost = false,
     .chnmon_active = false,
     .indicator_addresses =