How can I remove a paclet that was automatically downloaded when I used a function for the first time (i.e.
I believe the download was faulty, preventing me from using any of the functions from that paclet (e.g. ElementwiseLayer, etc.). That's why I want to redownload it. If I understand correctly, paclets are downloaded from the Wolfram Research Server when an uncommon function such as
Sound are used for the first time (indicated by a blue progress bar under the cell).