On GitHub PRs, we now display EWS results in status-bubbles format instead of Github native checks UI. We should stop showing GitHub checks.
Pull request: https://github.com/WebKit/WebKit/pull/4767
This basically reverts https://bugs.webkit.org/show_bug.cgi?id=235210
<rdar://problem/100777585>
Bug 262319 suggests moving in the opposite direction, adding _more_ GitHub status checks, and not less.
Also note there is discussion on the PR about whether or not we want to do this.