The variable "lun" is being initialized with a value that is never read, it
is being updated later on. The assignment is redundant and can be removed.

Link: https://lore.kernel.org/r/20210616171621.16176-1-colin.king@canonical.comReviewed-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Addresses-Coverity: ("Unused value")