Stop passing deprecated flags to WebRTC's compare_videos.py.

Some compare_videos.py flags will be removed by [1]. They were already
deprecated and not used.

[1] - https://webrtc-review.googlesource.com/c/src/+/143788

Bug: None
Change-Id: Id37735b18ce5573468b8583e9f14392bc1b12128
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1675671
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Commit-Queue: Mirko Bonadei <mbonadei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672127}
1 file changed