Variable key_ref is being assigned a value that is never read;
key_ref is being re-assigned a few statements later.  Hence this
assignment is redundant and can be removed.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Reviewed-by: NJames Morris <james.l.morris@oracle.com>