Remove WebKitSetIsClassic check

[AtariDreams]

85c350c

Remove WebKitSetIsClassic check
https://bugs.webkit.org/show_bug.cgi?id=252822

Reviewed by Alex Christensen.

This function is no longer being called, so we can remove it.

*Source\WebKitLegacy\ios\Misc\WebUIKitSupport.h:
*Source\WebKitLegacy\ios\Misc\WebUIKitSupport.mm:
*Source\WebKitLegacy\ios\WebKit.iOS.exp:

Canonical link: https://commits.webkit.org/260832@main

1d945b3

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress
✅ 🛠 🧪 merge	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 2f67a4f)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk
✅ 🧪 webkitperl	🧪 ios-wk2	🧪 api-mac	✅ 🧪 gtk-wk2
	🧪 api-ios	🧪 mac-wk1	❌ 🧪 api-gtk
	✅ 🛠 tv	🧪 mac-wk2
	✅ 🛠 tv-sim	🧪 mac-AS-debug-wk2
	✅ 🛠 watch	🧪 mac-wk2-stress
	✅ 🛠 watch-sim

[achristensen07]

I'm approving this after having searched internally. However, cleanups like this in WebKitLegacy are likely wasted effort.

[webkit-early-warning-system]

EWS run on previous version of this PR (hash 4fdb630)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk
✅ 🧪 webkitperl	🧪 ios-wk2	🧪 api-mac	🧪 gtk-wk2
	✅ 🧪 api-ios	🧪 mac-wk1	🧪 api-gtk
	✅ 🛠 tv	🧪 mac-wk2
	✅ 🛠 tv-sim	🧪 mac-AS-debug-wk2
	⏳ 🛠 watch	✅ 🧪 mac-wk2-stress
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash 1d945b3)

Misc	iOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 wincairo
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🛠 gtk
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 gtk-wk2
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🧪 api-gtk
	✅ 🛠 tv	✅ 🧪 mac-wk2
	✅ 🛠 tv-sim	✅ 🧪 mac-AS-debug-wk2
	✅ 🛠 watch	✅ 🧪 mac-wk2-stress
✅ 🛠 🧪 merge	✅ 🛠 watch-sim

[webkit-commit-queue]

Committed 260832@main (85c350c): https://commits.webkit.org/260832@main

Reviewed commits have been landed. Closing PR #10581 and removing active labels.