This patch reverts "Bug 1920813 - Add performance test for WebCodecs video encoding r=perftest-reviewers,media-playback-reviewers,aosmond,padenot,sparky" by running `git revert` with modification needed. Differential Revision: https://phabricator.services.mozilla.com/D234114
=========== mozperftest =========== **mozperftest** can be used to run performance tests against browsers. See the docs directory.