Remove deprecated function argument

[mthrok]

In #1036, we have deprecated the argument which was introduced by an accident in the first place. Now we have finished with 0.8.0 release and master branch points to 0.9.0. We can remove the argument itself.

Steps

1. Remove normalized from the function signature, docstring.
2. Remove the deprecation warning

Testing

For the build process, please refer to the CONTRIBUTING.md.

The following tests should pass before and after the change..

python setup.py develop && ( cd test && pytest torchaudio_unittest/functional -vk griff)

cc @krishnakalyan3 if you are interested in