Deleting a datapoint template in a datapoint group in the developer application
Datapoint templates added to a custom datapoint group can be removed from the group.
Delete Dependency: If a datapoint template in a datapoint group is imported in a product or utilised in configuring alarm rules template or other computational datapoint templates, it becomes a dependency for those elements. You must first remove them from the product they are associated with and the corresponding alarm rules template and computational datapoint templates using it. Only then can you delete the datapoint template.
Note: Datapoint templates in imported datapoint groups cannot be deleted.
To delete a datapoint template of a datapoint group in the developer application,
Access the Developer Application.
Click Datapoint Groups in the left pane.
Select the datapoint group which has the datapoint template you want to delete. For this illustration, the datapoint group Home Automation is selected.
Select the check box near the datapoint template you want to edit. For this illustration, the datapoint Window Status is selected.
Click the Delete button that appears. 
Click Check Dependencies in the validation pop-up.

Click Delete in the confirmation pop-up.
The datapoint template will now be deleted from the custom datapoint group.