message: Update summary_ops_graph_test.py
diff: @@ -21,7 +21,6 @@ import tempfile
  import six
  from tensorflow.contrib.summary import summary_ops
  -from tensorflow.contrib.summary import summary_test_internal
  from tensorflow.contrib.summary import summary_test_util
  from tensorflow.core.framework import graph_pb2
  from tensorflow.core.framework import node_def_pb2
  