[py] Fix Docs generation.

A PR brought in dependencies but tox didn't like them so reverted them.

Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/SeleniumHQ/selenium
Cr-Mirrored-Commit: 0e404b966e0c890f8688e7e146311f311e5ec9ca
1 file changed