wifi: Cleanup unused calculation in non-HT duplicate tests

Author: sderonne

src/wifi/test/wifi-non-ht-dup-test.cc

@@ -339,16 +339,9 @@ TestNonHtDuplicatePhyReception::SendNonHtDuplicatePpdu(MHz_u channelWidth)
                                          channelWidth,
                                          false);
 
-    Ptr<Packet> pkt = Create<Packet>(1000);
+    auto pkt = Create<Packet>(1000);
     WifiMacHeader hdr;
-
-    hdr.SetType(WIFI_MAC_QOSDATA);
-    hdr.SetQosTid(0);
-
-    Ptr<WifiPsdu> psdu = Create<WifiPsdu>(pkt, hdr);
-    Time txDuration =
-        SpectrumWifiPhy::CalculateTxDuration(psdu->GetSize(), txVector, m_phyAp->GetPhyBand());
-
+    auto psdu = Create<WifiPsdu>(pkt, hdr);
     m_phyAp->Send(WifiConstPsduMap({std::make_pair(SU_STA_ID, psdu)}), txVector);
 }