Revert "Running python unit tests with bazel"

This reverts commit 99fc0e0c8684ecd7e683093605aea09857529340.

Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/SeleniumHQ/selenium
Cr-Mirrored-Commit: 753fda3d31017bd529fb6dad5772857291b8caf5
225 files changed