Revert "scsi: fix soft lockup in scsi_remove_target() on module removal"

Now that we've done a more comprehensive fix with the intermediate
target state we can remove the previous hack introduced with commit
90a88d6e

 ("scsi: fix soft lockup in scsi_remove_target() on module
removal").

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Cc: stable@vger.kernel.org
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>