When you no longer require a category, it is best to suspend it from the system to avoid confusion or prevent products and services from being assigned to the incorrect category.
Click the following link:
From the top menu, click on the Products tab.
From the drop-down menu, select Categories
The Categories page will appear.
Select the Category you wish to Suspend, e.g. Discounts.
The Categories details page will appear, as shown below.
Click the Blue Active slider button, and the status will change to Suspended.
Suspended status shown below.
Remember to click the blue Save button.
You have now suspended a Category.