scsi/aacraid: Delete obsolete TODO file

The TODO file here has not been updated from 2.6.12 for more than 15 years.
Its existence will mislead developers seeking to view outdated information.
Signed-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/scsi/aacraid/TODO

-o	Testing
-o	More testing
-o	I/O size increase