Make sure that clean job processes all folders (#481)
Make sure that clean job processes all folders (#481)

The list of folders to check was hardcoded, and `ids` was not in the list.

This update computes the list automatically looking at the `ed` folder
(assuming that the `tr` list is the same).

Via https://github.com/w3c/webref/issues/467#issuecomment-1026580399
tidoust/reffy-reports,tidoust/reffy-reports