message: Duplicate imports in histogram_ops.py
diff: @@ -32,7 +32,6 @@ from tensorflow.python.ops import clip_ops
  from tensorflow.python.ops import gen_math_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.util.tf_export import tf_export
  -from tensorflow.python.util.tf_export import tf_export
  @tf_export('histogram_fixed_width_bins')
  