@jtinmouth
From where are you trying to delete the folder? You have to navigate into the empty folder, and then the delete option should be available at the bottom.
There's 2 main restrictions to determine if a folder is deletable:
1) is it empty? (includes ignored devices) - best bet is to do a query from the database to make sure not devices have that ap_folder_id [for example (ap_folder_id=1 is Top folder, you get the ap_folder_id from the URL when you navigate into the specific folder): dbc 'select * from ap where ap_folder_id=1']
2) are there any roles assigned to that folder? (you can also check from AMP Setup -> roles)
If folder is empty, you would see that the delete option is available:
If folder has devices, you would see:
If you have a user role assigned to that folder, then you might see: