You can delete an Entity if it does not contain documents.

Step 1.  From the main menu select "Manage Entities".

Step 2.  Select the Entity you want to delete.

Step 3.  Select the trash icon in the top-right corner of the screen.

Step 4.  A message will appear asking if you want to delete the Entity. Click "YES".

You will then see a message saying "Entity deleted successfully".