BC-Breaking: Remove deprecated load_wav functions from backends

[iseessel]

Testing Steps:

Run entire test suite.

I am getting one failure locally, but it doesn't look related to these changes.

Seems to have to do with imprecision of floating point arithemetic. Let me know if you want me to relax the threshold slightly -- it may be that the tests do not fail on CI build. (edit: I actually don't see the tests running on checks).

Let me know what you think. Thanks!

[mthrok]

Hi @iseessel

Thanks for working on this. Did you set the sox command path from the artifact of the build process? This kind of precision mismatch happens when sox command from system package manager (like apt, brew) is used. But anyway I do not think that your change is related to the failure you reported, so it should be fine.

The change looks good. I think CircleCI is hiccuping today. I will come back and see if we can trigger CI.

[iseessel]

@mthrok hmm... I did use the locally built sox as opposed to the package.

[mthrok]

@iseessel Can you push something so that web hook is delivered? I cannot find a way to trigger CI.

[mthrok]

Strange... other PRs are triggering CI properly but not this one.

let me see if closing and reopening helps.

[mthrok]

here it goes.

[mthrok]

@iseessel flake8 is failing. Can you remove the no longer used import statement?

torchaudio/backend/no_backend.py:2:1: F401 'typing.Any' imported but unused

[iseessel]

Yep, I see a few failures, I'll work through them. @mthrok

[mthrok]

@iseessel other PRs landed on master is causing conflict. Could you resolve it?

[iseessel]

I've rebased and resolved conflicts. @mthrok

Errors I've fixed:

1. Sphinx Doc creation was failing -- I've updated relevant rst's to remove deleted methods from the docs.
2. "torchaudio/backend/no_backend.py:2:1: F401 'typing.Any' imported but unused" style guide was failing. I've removed the import.

Tests Still failing (Look unrelated to PR):

1. https://github.com/pytorch/audio/pull/1362/checks?check_run_id=204296817. Looks like a dependency issue.

[mthrok]

Thanks!