trafgen: remove write-only variable pkt

Signed-off-by: Tobias Klauser <[email protected]>

trafgen.c

@@ -928,9 +928,7 @@ static void xmit_packet_precheck(struct ctx *ctx, unsigned int cpu)
 
 static void pcap_load_packets(struct dev_io *dev)
 {
- struct packet *pkt;
-
- while ((pkt = dev_io_read(dev)) != 0)
+ while (dev_io_read(dev))
  /* nothing to do */;
 }