This dep was causing the script to fail because it doesn't have HEAD.

Bug: angleproject:5887
Change-Id: Ib6daabfe2e0b105137784ceb80d4147f0eb71f41
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2848640Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>