Revert the change to rtc_tools/testing/utils.py in https://webrtc-review.googlesource.com/c/src/+/12540 because it breaks downstream build pipeline. TBR=phoglund@webrtc.org Bug: webrtc:8393,b/67931921 Change-Id: Iee77f6b9b15fe03894ee63b48c07eaf3dce40c99 No-try: True Reviewed-on: https://webrtc-review.googlesource.com/13101 Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Commit-Queue: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20337}