Remove implied CIPD packages from scripts/trigger.py All of chromium's test pools should have these packages automatically added via task templates. So there's no need to add them ourselves in this script. Bug: chromium:812428 Change-Id: I283ad5963cdf237220545c5ed1f21892f6ade18e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2241901 Commit-Queue: Yuly Novikov <ynovikov@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Reviewed-by: Robbie Iannucci <iannucci@chromium.org>