This page shows how to remove scheduled jobs that were used to refresh dial lists in your org. You can read about dynamic dial lists here.
Removing scheduled dial list refreshing
Scheduled refreshes used Salesforce's Apex Scheduler. For information about the Apex scheduler, see Salesforce help. If you used the Apex scheduler to refresh Dial Lists, you must turn off the schedules in your org.
If any of the scheduled jobs perform actions other than refreshing Dial Lists, ensure that you no longer need to perform those actions. If you do still require these actions, do not remove the jobs until you have made alternative arrangements for the actions.
To remove a scheduled job, go to Scheduled Jobs in Salesforce settings, and delete the jobs that you want to remove.
