message: Fix redundancy in RELEASE.md
diff: @@ -404,14 +404,6 @@ answered questions, and were part of inspiring discussions.
  # Release 1.4.0
  -## Major Features And Improvements
  -* `tf.keras` is now part of the core TensorFlow API.
  -* [`tf.data`](http://tensorflow.org/programmers_guide/datasets) is now part of
  - the core TensorFlow API.
  - * The API is now subject to backwards compatibility guarantees.
  -
  -# Release 1.4.0
  -
  ## Major Features And Improvements
  * `tf.keras` is now part of the core TensorFlow API.
  * [`tf.data`](http://tensorflow.org/programmers_guide/datasets) is now part of
  