fix: 删除多余mapper

gongchunyi

昨天 9945c401f1b3618d25f88244e54cf78fbd3b9950

 src/main/java/com/ruoyi/device/service/impl/DeviceMaintenanceServiceImpl.java

@@ -17,7 +17,6 @@

import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;