[Bug][Api] Complete Data workflow remove duplicates. (#10850)

* [Bug][Api] Complete Data workflow remove duplicates.

Co-authored-by: houshitao <shitaohou@163.com>
Co-authored-by: kezhenxu94 <kezhenxu94@apache.org>

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ExecutorServiceImpl.java

@@ -985,14 +985,8 @@ public class ExecutorServiceImpl extends BaseServiceImpl implements ExecutorServ
      * @return remove duplicate date list
      */
     private String removeDuplicates(String scheduleTimeList) {
-        HashSet<String> removeDate = new HashSet<String>();
-        List<String> resultList = new ArrayList<String>();
         if (StringUtils.isNotEmpty(scheduleTimeList)) {
-            String[] dateArrays = scheduleTimeList.split(COMMA);
+            return Arrays.stream(scheduleTimeList.split(COMMA)).map(String::trim).collect(Collectors.joining(COMMA));
-            List<String> dateList = Arrays.asList(dateArrays);
-            removeDate.addAll(dateList);
-            resultList.addAll(removeDate);
-            return String.join(COMMA, resultList);
         }
         return null;
     }