Remove logging.CODE (#90234)
Fixes https://github.com/pytorch/torchdynamo/issues/1932
Discussed with @mlazos: if we still want to separate streams for code logging and the rest of info, we can use a separate logger object with a unique name.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/90234
Approved by: https://github.com/ezyang
