Merge "Prune departed users from OWNERS" am: 8b0f12aa07 am: 0084db79d2 am: e85acd9d92

Original change: https://android-review.googlesource.com/c/platform/external/libvpx/+/1884250

Change-Id: I620f3954889a9c76d3006e377a7450524e710aff