Remove alancoon from the list of validators on ews-build.webkit.org.
<rdar://problem/105086072>
Pull request: https://github.com/WebKit/WebKit/pull/9697
Committed 259900@main (73a9efb7d8c7): <https://commits.webkit.org/259900@main> Reviewed commits have been landed. Closing PR #9697 and removing active labels.