s390/cio: remove unused struct member

Remove an unused member of struct channel subsystem.
Signed-off-by: NSebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: NPeter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/css.c

@@ -818,7 +818,6 @@ static int __init setup_css(int nr)
 	css->device.release = channel_subsystem_release;
 
 	mutex_init(&css->mutex);
-	css->valid = 1;
 	css->cssid = chsc_get_cssid(nr);
 	css_generate_pgid(css, (u32) (get_tod_clock() >> 32));
 

drivers/s390/cio/css.h

@@ -114,7 +114,6 @@ void css_update_ssd_info(struct subchannel *sch);
 
 struct channel_subsystem {
 	int cssid;
-	int valid;
 	struct channel_path *chps[__MAX_CHPID + 1];
 	struct device device;
 	struct pgid global_pgid;