remove garbage code
remove garbage code

XiaodunServerGroup/xiaodun-platform,XiaodunServerGroup/xiaodun-platform,XiaodunServerGroup/xiaodun-platform,XiaodunServerGroup/medicalmooc,XiaodunServerGroup/medicalmooc,XiaodunServerGroup/medicalmooc,liuqr/edx-xiaodun,XiaodunServerGroup/xiaodun-platform,XiaodunServerGroup/medicalmooc,liuqr/edx-xiaodun,liuqr/edx-xiaodun,liuqr/edx-xiaodun,XiaodunServerGroup/medicalmooc,XiaodunServerGroup/xiaodun-platform,XiaodunServerGroup/xiaodun-platform