Remove cwd manipulations. Doesn't appear to be needed as the underlying functions are already using the executable path. Bug: angleproject:7410 Change-Id: Ia9566c7159624bcb039d7dd2e9d23f4b18649f45 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3695519 Commit-Queue: Roman Lavrov <romanl@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>