修复网考后台考试成绩统计之离线考试是否缺考时的一个陈年老bug

examcloud-core-oe-face-service/src/main/java/cn/com/qmth/examcloud/core/oe/student/face/service/impl/BaiduFaceLivenessWorker.java

@@ -9,10 +9,6 @@ import cn.com.qmth.examcloud.core.oe.student.face.service.ExamCaptureService;
 import cn.com.qmth.examcloud.web.support.SpringContextHolder;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.json.JSONException;
-import org.json.JSONObject;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 /**
  * 百度活体检测工作线程