code: public void deleteMetadata(String templateName, String scope) {
          URL url = METADATA_URL_TEMPLATE.build(this.getAPI().getBaseURL(), this.getID(), scope, templateName);
          BoxAPIRequest request = new BoxAPIRequest(this.getAPI(), url, "DELETE");
          BoxAPIResponse response = request.send();
          response.disconnect();
      }
docs: Deletes the metadata on this folder associated with a specified scope and template.
  
  @param templateName the metadata template type name.
  @param scope        the scope of the template (usually "global" or "enterprise").