build fix

Author: mihai-ignat

src/include/platform/internal/GenericConnectivityManagerImpl_NoWiFi.h

@@ -74,7 +74,6 @@ class GenericConnectivityManagerImpl_NoWiFi
     bool _CanStartWiFiScan();
     void _OnWiFiScanDone();
     void _OnWiFiStationProvisionChange();
-    CHIP_ERROR _DisconnectNetwork(void);
     static const char * _WiFiStationModeToStr(ConnectivityManager::WiFiStationMode mode);
     static const char * _WiFiAPModeToStr(ConnectivityManager::WiFiAPMode mode);
     static const char * _WiFiStationStateToStr(ConnectivityManager::WiFiStationState state);
@@ -222,12 +221,6 @@ inline const char * GenericConnectivityManagerImpl_NoWiFi<ImplClass>::_WiFiAPSta
     return nullptr;
 }
 
-template <class ImplClass>
-inline CHIP_ERROR GenericConnectivityManagerImpl_NoWiFi<ImplClass>::_DisconnectNetwork(void)
-{
-    return CHIP_ERROR_UNSUPPORTED_CHIP_FEATURE;
-}
-
 } // namespace Internal
 } // namespace DeviceLayer
 } // namespace chip