WinCairo WK1 was removed. So remove the CFNetwork related code in curl port that was kept for compatibility.
Pull request: https://github.com/WebKit/WebKit/pull/14909
Committed 265132@main (cd7cdb4d4f27): <https://commits.webkit.org/265132@main> Reviewed commits have been landed. Closing PR #14909 and removing active labels.
<rdar://problem/110728338>