fix response `content-type` is not set if access without access token

Kairlec

2023-05-15 ca103731c721aae3f5f622e58c679ed5c09fd9e9

 src/main/java/com/genersoft/iot/vmp/gb28181/task/ISubscribeTask.java

@@ -7,6 +7,4 @@
 */
public interface ISubscribeTask extends Runnable{
    void stop();

    DialogState getDialogState();
}