This is follow-up to https://bugs.webkit.org/show_bug.cgi?id=244694 in which we stopped sending stepStarted event to Github directly. At that time, we excluded non-default repositories (e.g: security repo), since we didn't had EWS status-bubble support for non-default repos. Now that EWS status-bubbles are working for all the repo, we should stop sending these events.

This will also reduce little bit of load from ews buildbot server, as for every build-step on every build, few database calls are done and network requests are made for this.