fix

mec-biz/src/main/java/com/ym/mec/biz/service/impl/CourseScheduleServiceImpl.java

@@ -43,7 +43,6 @@ import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.collections.ListUtils;
 import org.apache.commons.collections.MapUtils;
 import org.apache.commons.lang3.StringUtils;
-import org.jetbrains.annotations.NotNull;
 import org.joda.time.DateTime;
 import org.joda.time.format.DateTimeFormat;
 import org.slf4j.Logger;