remove testing_utils/ dir

[melange396]

it only contains one file, https://github.com/cmu-delphi/covidcast-indicators/blob/833e81834e32d7ae91a2d4382b6e411095355290/testing_utils/indicator_validation.py, which does not seem to be referenced anywhere in the cmu-delphi github org's codebase.

[dshemetov]

Sounds good to me. For context, this was a script I used sanity check indicator output with live data after making a change.

[melange396]

oh ok. i found it because it uses the python covidcast client w/ the async mode, which isnt ideal... if you wanna keep it around for future reference, maybe add some comments at the top of it that mention what its for and how to use it?

[dshemetov]

Honestly, I'm happy to delete it mostly because I don't know when I'll have time to update it. I already copied the code to my local snippets folder so it can go whenever.