[SCSI] scsi_cmnd.h: remove double inclusion of linux/blkdev.h

Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

include/scsi/scsi_cmnd.h

@@ -7,7 +7,6 @@
 #include <linux/types.h>
 #include <linux/timer.h>
 #include <linux/scatterlist.h>
-#include <linux/blkdev.h>
 
 struct Scsi_Host;
 struct scsi_device;