message: Removed unneccessary sentence
diff: @@ -1170,8 +1170,6 @@ class LearningRateScheduler(Callback):
  verbose: int. 0: quiet, 1: update messages.
  ```python
  - # Firstly, let's create a function which
  - # maps a given epoch to a learning rate.
  # This function keeps the learning rate
  # at 0.001 for the first ten epochs and
  # decreases it exponentially after that.
  