Pre Merge pull request !36 from 阿斌/N/A

src/main/java/com/genersoft/iot/vmp/gb28181/service/impl/DeviceChannelServiceImpl.java

@@ -113,9 +113,6 @@ public class DeviceChannelServiceImpl implements IDeviceChannelService {
 
     @Override
     public int updateChannels(Device device, List<DeviceChannel> channels) {
-        if (CollectionUtils.isEmpty(channels)) {
-            return 0;
-        }
         List<DeviceChannel> addChannels = new ArrayList<>();
         List<DeviceChannel> updateChannels = new ArrayList<>();
         HashMap<String, DeviceChannel> channelsInStore = new HashMap<>();