wifi: Cleanup unused parameter in WifiSpectrumSignalParameters

src/wifi/model/phy-entity.cc

@@ -1301,7 +1301,6 @@ PhyEntity::Transmit(Time txDuration,
     txParams->duration = txDuration;
     txParams->psd = txPowerSpectrum;
     txParams->ppdu = ppdu;
-    txParams->txCenterFreq = GetCenterFrequencyForChannelWidth(txVector);
     NS_LOG_DEBUG("Starting " << type << " with power " << WToDbm(txPowerWatts) << " dBm on channel "
                              << +m_wifiPhy->GetChannelNumber() << " for "
                              << txParams->duration.As(Time::MS));

src/wifi/model/wifi-spectrum-signal-parameters.cc

@@ -30,7 +30,6 @@ namespace ns3
 NS_LOG_COMPONENT_DEFINE("WifiSpectrumSignalParameters");
 
 WifiSpectrumSignalParameters::WifiSpectrumSignalParameters()
-    : txCenterFreq(0)
 {
     NS_LOG_FUNCTION(this);
 }
@@ -40,7 +39,6 @@ WifiSpectrumSignalParameters::WifiSpectrumSignalParameters(const WifiSpectrumSig
 {
     NS_LOG_FUNCTION(this << &p);
     ppdu = p.ppdu;
-    txCenterFreq = p.txCenterFreq;
 }
 
 Ptr<SpectrumSignalParameters>

src/wifi/model/wifi-spectrum-signal-parameters.h

@@ -50,7 +50,6 @@ struct WifiSpectrumSignalParameters : public SpectrumSignalParameters
     WifiSpectrumSignalParameters(const WifiSpectrumSignalParameters& p);
 
     Ptr<const WifiPpdu> ppdu; ///< The PPDU being transmitted
-    uint16_t txCenterFreq;    ///< the center frequency of the transmitted signal in MHz
 };
 
 } // namespace ns3