Delete a Maintenance Window
From the Administration section of the Settings screen, click Maintenance Windows.
The Maintenance Windows screen contains a grid that shows all of the currently configured maintenance windows.
Identify the maintenance window entry that you want to delete.
Hover your cursor over the entry and click the x at the end of the row.
A Warning dialog appears, asking you to confirm the deletion.
Click OK.
The entry is deleted and no longer displays on the Settings> Maintenance Windows page.