scsi_xsh_del the io handler in deactivate to prevent it from being run on a device thats now gone, or from being on the list of pending io when the device is actually detached.
scsi_xsh_del the io handler in deactivate to prevent it from being run on
a device thats now gone, or from being on the list of pending io when
the device is actually detached.

found and fix tested by jakemsr@
"go for it" jakemsr@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars