fix bug

themis-exam/src/main/java/com/qmth/themis/exam/websocket/WebSocketMobileServer.java

@@ -151,7 +151,6 @@ public class WebSocketMobileServer implements Concurrently {
                 map.put("monitorVideoSource", this.source.name());
                 WebsocketDto websocketDto = new WebsocketDto(WebsocketTypeEnum.MOBILE_MONITOR_STOP.name(), map);
                 webSocketOeServer.sendMessage(websocketDto);
-                ExamConstant.sendExamStopMsg(this.recordId, true);
             }
         }
         log.info("用户退出:{},当前在线人数为:{},updateTime:{}", this.sessionId, getOnlineCount(), this.updateTime);