You can delete a task from a task list in the following ways. Click the task list to see the tasks in the Content pane.
Select the task to delete and click the trash icon on the toolbar.
Right-click on the task and select Delete. Click Yes.
The task is removed from the list.
Note: If you delete a task, you can immediately undo this action by clicking the Undo link that appears at the top of the page. The task is moved back to its original location.