message: Fix unused tf.asserts
diff: @@ -112,16 +112,17 @@ def rotate_train(x, pi):
  return tensor
  squares = go.N * go.N
  - tf.assert_equal(pi.shape.as_list(), [squares + 1])
  + assert_shape_pi = tf.assert_equal(pi.shape.as_list(), [squares + 1])
  x_shape = x.shape.as_list()
  - tf.assert_equal(x_shape, [go.N, go.N, x_shape[2]])
  + assert_shape_x = tf.assert_equal(x_shape, [go.N, go.N, x_shape[2]])
  pi_move = tf.slice(pi, [0], [squares], name="slice_moves")
  pi_pass = tf.slice(pi, [squares], [1], name="slice_pass")
  # Add a final dim so that x and pi have same shape: [N,N,num_features].
  pi_n_by_n = tf.reshape(pi_move, [go.N, go.N, 1])
  + with tf.control_dependencies([assert_shape_x, assert_shape_pi]):
  pi_rot = tf.concat(
  [tf.reshape(rotate(pi_n_by_n), [squares]), pi_pass],
  axis=0)
  