[Cocoa] Delete HAVE(CORETEXT_AUTO_OPTICAL_SIZING) because it's available everywhere
<rdar://problem/105370115>
Pull request: https://github.com/WebKit/WebKit/pull/10005
Committed 260174@main (1facae010716): <https://commits.webkit.org/260174@main> Reviewed commits have been landed. Closing PR #10005 and removing active labels.