I can happily add new labels and other resources to my moodle courses. However, I am unable to delete resources such as labels or Files in any of my courses.
I can edit these resources but not delete them.
I have used courses from 2016 as imports to this year's Moodle. (I only upgrade moodle once a year.)
I can delete labels in the 2016 Moodle (Ver 2.8.1+)
I still have the 2016 Moodle running somewhere.