code: def delete_metadata(self, container, prefix=None):
          
          # Add the metadata prefix, if needed.
          if prefix is None:
              prefix = CONTAINER_META_PREFIX
          new_meta = {}
          curr_meta = self.get_metadata(container, prefix=prefix)
          for ckey in curr_meta:
              new_meta[ckey] = ""
          uri = "/%s" % utils.get_name(container)
          resp, resp_body = self.api.method_post(uri, headers=new_meta)
          return 200 <= resp.status_code <= 299
docs: Removes all of the container's metadata.
  
          By default, all metadata beginning with the standard container metadata
          prefix ('X-Container-Meta-') is removed. If you wish to remove all
          metadata beginning with a different prefix, you must specify that
          prefix.