source_tree_test_config: remove deprecated fields

These are no longer in use by the test plan generator or by
infra/config, after https://crrev.com/c/2439398 and
https://crrev.com/i/3305703 respectively.

Bug: 1130018
Change-Id: Ie91ce25da4688650dc5932ddaeac1a1fb7355b21
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/2442725
Reviewed-by: Dhanya Ganesh <dhanyaganesh@chromium.org>
Commit-Queue: Sean Abraham <seanabraham@chromium.org>
2 files changed