infra/config: remove goma property Bug: angleproject:8309 Change-Id: Ia657986ebc3bc49423736af743983bec6467775a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4787413 Auto-Submit: Takuto Ikuta <tikuta@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>