scsi: aacraid: Remove useless code

There isn't a AAC_MIN_NATIVE_SIZE defined so remove eight useless lines.
When at it remove also an unused #define

No functional change.

Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Link: https://lore.kernel.org/r/20250521165148.8856-1-thenzl@redhat.com


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>