To remove a reference, perform the following steps:
1. Click on the icon next to the username on the right-upper corner of the screen
2. Select the Settings from the dropdown
3. Click on Reference Settings
4. Choose the category
5. Click on Actions dropdown and edit
6. Click on the Minus (“-” or “delete”) icon and save the changes.
The reference item will be deleted from the list.
Note that system reference items cannot be deleted.