You can delete a workflow schedule.
From the navigation pane, go to Developer tools.
The Developer tools page appears.
Click the Workflows tile.
The Workflows page appears.
In the upper-right corner of the page, from the All tasks list , select Schedules.
The Schedules page appears.
In the row for the workflow schedule that you want to delete, click the action button , and then click Delete.
A confirmation dialog box appears.