power: remove unused variable
power: remove unused variable

Variable pfi_str is removed since it is unused.

Fixes: 450f0791312c ("power: add traffic pattern aware power control")
Cc: stable@dpdk.org

Signed-off-by: Pallantla Poornima <756fdb0861efad85838173e0a29ad4c7efdfe95b@intel.com>
Reviewed-by: Rami Rosen <d906574dd7f018d5d95e7b7a8107cdf708745f05@gmail.com>
Acked-by: Aaron Conole <aa17ba42a0685b214660ffb377dc7569a94d48c9@redhat.com>
Acked-by: David Hunt <763be7c8e0ad91e03160e7aed76d5cd41534e2f9@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk