Eliminating unused labels

[Uday Reddy]

Kyle Farrell says (viewmail-info, 2012-03-21)

First thing I noticed is that deleting a label from all messages does
not delete that label from the folder (all labels show up as possible
completions). So I've got a growing set of labels. Is it possible to
delete the label from the folder?

[Uday Reddy (reddyuday)]

Julian Bradfield:

There's no official API to do this. But in a live folder you can do
 (unintern label vm-label-obarray)
to remove the label from the list that gets stashed when the folder is
saved.