message: Delete remaining instances of `num_replicas` usage.
diff: @@ -1092,11 +1092,6 @@ class ReplicaContext(object):
  finally:
  _pop_per_thread_mode()
  - @property
  - def num_replicas(self):
  - """Returns number of replicas, for purposes of averaging across replicas."""
  - return self._distribution_strategy.num_replicas
  -
  @property
  def num_replicas_in_sync(self):
  """Returns number of replicas over which gradients are aggregated."""
  @@ -1204,10 +1199,6 @@ class _DefaultDistributionStrategy(DistributionStrategy):
  def value_container(self, value):
  return value
  - @property
  - def num_replicas(self):
  - return 1
  -
  @property
  def num_replicas_in_sync(self):
  return 1
  