message: expression_op_test: Remove sleep
  Reviewers: #tensorflow, davidn
  Subscribers: davidn
diff: @@ -16,7 +16,6 @@ from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  -import math
  import numpy as np
  from tensorflow.python import ipu
  @@ -26,9 +25,6 @@ from tensorflow.python.framework import test_util
  from tensorflow.python.platform import googletest
  from tensorflow.python.ops import array_ops
  -import time
  -time.sleep(20)
  -
  class CodeletExpressionOpTest(test_util.TensorFlowTestCase):
  @test_util.deprecated_graph_mode_only
  