remove no use

Author: 苏义超

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

@@ -206,9 +206,6 @@ public class WorkflowDefinitionServiceImpl extends BaseServiceImpl implements Wo
     @Autowired
     private WorkflowLineageService workflowLineageService;
 
-    @Autowired
-    private MetricsCleanUpService metricsCleanUpService;
-
     @Autowired
     private GlobalParamsValidator globalParamsValidator;