Revert "bpo-29585: optimize site.py startup time" by vstinner · Pull Request #2478 · python/cpython

the-knights-who-say-ni

Hum, I hesitated to revert the change, but I succeeded to fix at least the Windows buildbots with my PR #2477. IMHO the macOS buildbots can be fixed later, it's no more a blocking issue.

Windows was blocking all PRs since AppVeyor is now a mandatory CI.