Delete various old EWS specific scripts which are unused after the transition to new Buildbot based EWS.
Created attachment 425806 [details] [fast-cq] Patch
Comment on attachment 425806 [details] [fast-cq] Patch rs=me
Committed r275884 (236449@main): <https://commits.webkit.org/236449@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 425806 [details].
<rdar://problem/76590628>