[S390] cio: Remove grace period for vary off chpid.

The grace period handling introduced needless complexity. It didn't
help the dasd driver (which can handle terminated I/O just well),
and it doesn't help for long running channel programs (which won't
complete during the grace period anyway). Terminating I/O using a
path that just disappeared immediately is much more consistent with
what the user expects.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/device.h

@@ -21,7 +21,6 @@ enum dev_state {
 	/* states to wait for i/o completion before doing something */
 	DEV_STATE_CLEAR_VERIFY,
 	DEV_STATE_TIMEOUT_KILL,
-	DEV_STATE_WAIT4IO,
 	DEV_STATE_QUIESCE,
 	/* special states for devices gone not operational */
 	DEV_STATE_DISCONNECTED,