How to delete documents from a public group

I set up a group today and copied all of the documents from My Library into it. However, I now realise there are entry errors in the documents I copied over so would like to delete all documents in the group (NB not from My Library as I will make the necessary amendments there)and then add the documents to the Group again once all the entry errors have been taken care of. I can see no way to delete documents from the Group though! Should I/can I instead delete the Group and then set the Group up again from scratch? Thanks. J