删除remove语句

bi-server/src/main/java/com/usoftchina/bi/server/service/chart/ShowHistogramService.java

@@ -166,7 +166,6 @@ public class ShowHistogramService {
             }
             //有分组
             if (groupBy.size() != 0){
-                serieses.remove(0);
                 Iterator<String> itGroup = groupBy.iterator();  //分组数
 
                 //便利分组