net/cnxk: remove unused files after template rework

net/cnxk: remove unused files after template rework

Remove unused files that were left over after Rx and Tx template
function rework.

Fixes: 5169508a68fa ("net/cnxk: add cn9k template Rx functions to build")
Fixes: dd8c20eee472 ("net/cnxk: add cn9k template Tx functions to build")
Fixes: be294749a12a ("net/cnxk: add cn10k template Rx functions to build")
Cc: stable@dpdk.org
Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>