Go to Assets tab

Select Asset with Sub Location to delete

Click arrow to right of Location

Under Sub Locations, click arrow to right of Sub Location to delete

Click 3 dots (...) next to EDIT in top right corner

Click Delete

Click Yes

Go to Locations tab

Select Location with Sub Location

Click arrow to right of Sub Location

Click 3 dots (⋮) next to Edit in top right corner

Click Delete

Click Confirm