Now that we have upgraded build.webkit.org to latest buildbot (Bug 175056), we should delete the code which was added specifically to support both (old and new) Buildbot versions in parallel.
<rdar://problem/75443018>
Created attachment 423491 [details] Patch
Committed r274570: <https://commits.webkit.org/r274570> All reviewed patches have been landed. Closing bug and clearing flags on attachment 423491 [details].