message: Remove mentions of developer preview in TFLite docs.
diff: @@ -13,9 +13,6 @@ Here are a few of the differences between the two:
  developed with TensorFlow Lite will have a smaller binary size, fewer
  dependencies, and better performance.
  -- TensorFlow Lite is in developer preview, so not all use cases are covered yet.
  - We expect you to use TensorFlow Mobile to cover production cases.
  -
  - TensorFlow Lite supports only a limited set of operators, so not all models
  will work on it by default. TensorFlow for Mobile has a fuller set of
  supported functionality.
  