The RX and TX Prefetch, Host, and Write-back threshold values are defined but not used anywhere. They are leftovers from a previous patch. Fixes: 81f7ecd9 ("examples: use factorized default Rx/Tx configuration") Cc: stable@dpdk.org Signed-off-by: Bao-Long Tran <longtb5@viettel.com.vn>