Don't display a ubiquitous warning triggered on python 3.7. (#8523)
Don't display a ubiquitous warning triggered on python 3.7. (#8523)

Several of our 3rdparty deps trigger it, and until they fix
themselves to be 3.8 compatible, there's nothing we can do,
and no point in annoying our users with these warnings.
tdyas/pants,pantsbuild/pants,wisechengyi/pants,tdyas/pants,wisechengyi/pants,tdyas/pants,benjyw/pants,pantsbuild/pants,tdyas/pants,benjyw/pants,benjyw/pants,tdyas/pants,tdyas/pants,pantsbuild/pants,tdyas/pants,wisechengyi/pants,wisechengyi/pants,pantsbuild/pants,pantsbuild/pants,jsirois/pants,tdyas/pants,benjyw/pants,pantsbuild/pants,benjyw/pants,benjyw/pants,wisechengyi/pants,jsirois/pants,wisechengyi/pants,pantsbuild/pants,wisechengyi/pants,jsirois/pants,benjyw/pants,tdyas/pants,wisechengyi/pants,wisechengyi/pants