message: PSv2: Remove a TODO that has been addressed.
diff: @@ -985,8 +985,6 @@ class Client(object):
  scheduled function since the last time an error was thrown or since
  the beginning of the program.
  """
  - # TODO(b/159486639): Update the docs once we can cancel the functions being
  - # executed on workers, that when `join` returns, the system is stabilized.
  with _translate_parameter_server_failure():
  self.cluster.join()
  