code: def delete_boot_script(self):
          
          j, r = self.datacenter.request('DELETE', self.path + 
                  '/metadata/user-script')
          r.raise_for_status()
          self.boot_script = None
docs: ::
          
              DELETE /:login/machines/:id/metadata/user-script
          
          Deletes any existing boot script on the machine.