message: Replace the private API usage of remove_squeezable_dimensions with the forked version in keras.
diff: @@ -553,7 +553,7 @@ class MeanRelativeError(Mean):
  y_pred, y_true = losses_utils.squeeze_or_expand_dimensions(
  y_pred, y_true)
  - y_pred, self.normalizer = confusion_matrix.remove_squeezable_dimensions(
  + y_pred, self.normalizer = losses_utils.remove_squeezable_dimensions(
  y_pred, self.normalizer)
  y_pred.shape.assert_is_compatible_with(y_true.shape)
  relative_errors = math_ops.div_no_nan(
  