net/liquidio: Delete non-working LIQUIDIO_PACKAGE check

Size of LIQUIDIO_PACKAGE is 0 and it means that checks of package
version never worked, delete dead code.

Fixes: 32581245

 ("liquidio: Consolidate common functionality")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>