s390/sclp: remove unhandled memory notifier type

Remove memory notifier types which are unhandled by s390. Unhandled
memory notifier types are covered by default case.

Link: https://lkml.kernel.org/r/[e-mail]
Suggested-by: Alexander Gordeev <[e-mail]>
Reviewed-by: David Hildenbrand <[e-mail]>
Signed-off-by: Sumanth Korikkar <[e-mail]>
Cc: Aneesh Kumar K.V <[e-mail]>
Cc: Anshuman Khandual <[e-mail]>
Cc: Gerald Schaefer <[e-mail]>
Cc: Heiko Carstens <[e-mail]>
Cc: Michal Hocko <[e-mail]>
Cc: Oscar Salvador <[e-mail]>
Cc: Vasily Gorbik <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

drivers/s390/char/sclp_cmd.c

···
 		if (contains_standby_increment(start, start + size))
 			rc = -EPERM;
 		break;
-	case MEM_ONLINE:
-	case MEM_CANCEL_OFFLINE:
-		break;
 	case MEM_GOING_ONLINE:
 		rc = sclp_mem_change_state(start, size, 1);
 		break;