If you have the Full permission on a document, you can delete the most recent version of the document or delete the document (and all its versions). When you delete a document, you also delete all the objects it contains. If you have Full permission on a folder and all its contents, you can delete it and all the versions of all the documents it contains.
To delete all the versions of a document in a branch, right-click the document and select Delete Document.
To delete a folder, right-click it and select Delete. You must have Full permission on the folder and all its contents.