Revert "fix: disable device when interfaceFlags changes to 0"

This reverts commit e8d799a.

Author: dengbo11

system/network/network.go

@@ -333,23 +333,6 @@ func (n *Network) addDevice(devPath dbus.ObjectPath) error {
 		}
 	})
 
-	d.InterfaceFlags().ConnectChanged(func(hasValue bool, value uint32){
-		if !hasValue {
-			return
-		}
-
-		logger.Debugf("recv interfaceFlags changed signal, current value: %v", value)
-
-		// NOTE: only when value is 0, set it disable
-		if value == 0 {
-			n.enableDevice(dev.iface, false)
-		}
-
-		if err != nil {
-			logger.Warningf("enable dev failed, err: %v", err)
-		}
-	})
-
 	dev.iface, err = d.Interface().Get(0)
 	if err != nil {
 		logger.Warning(err)