Xcode has been emitting target triples for years, since at least Xcode 11. I don't think there is any reason we need to continue checking this condition.
Pull request: https://github.com/WebKit/WebKit/pull/7649
Committed 257896@main (0f43b50f3717): <https://commits.webkit.org/257896@main> Reviewed commits have been landed. Closing PR #7649 and removing active labels.
<rdar://problem/103383066>