If a task is not required, you can delete the task. Alternatively, you can cancel the task. This retains a record of the task, but in a read-only state, similar to completing a task. If there are Dependencies on the task, the task will be considered finished. If you are not sure whether to delete or cancel, you can cancel first and then later delete the cancelled task.
Cancel is available when the task is not in progress. If you want to cancel a task that a partner is working on, you will need to recall the task.
Select the Cancel task option from the task's context menu.
Confirm and use Cancel task to cancel the task.