From the main menu click on Units and choose All Units. 



Units



It displays all units categorized under various columns




By clicking on the button, you will be able to Edit or Delete the unit




By hitting the Edit button, it will allow you to edit fields and to update info regarding the unit.






Similarly by hitting on the Delete button throws a popup to reconfirm the Deletion.



Then click on yes, it will delete the particular unit from the unit set 


Units