[Gardening] Skip fullscreen WPT on iOS

https://bugs.webkit.org/show_bug.cgi?id=249481
rdar://103449714

Unreviewed.

iOS doesn't enable the fullscreen API.

* LayoutTests/platform/ios/TestExpectations:

Canonical link: https://commits.webkit.org/257998@main

LayoutTests/platform/ios/TestExpectations

@@ -82,6 +82,7 @@ fast/images/animated-heics-draw.html [ Pass ]
 # No fullscreen API on iOS
 fullscreen
 http/tests/fullscreen
+imported/w3c/web-platform-tests/fullscreen
 compositing/no-compositing-when-full-screen-is-present.html
 webkit.org/b/200308 fast/events/touch/ios/content-observation/non-visible-content-change-in-fullscreen-mode.html [ Skip ]
 
@@ -3799,8 +3800,6 @@ webkit.org/b/248919 editing/selection/doubleclick-whitespace-live-range.html [ F
 
 webkit.org/b/248923 fast/rendering/render-style-null-optgroup-crash.html [ Pass Failure ]
 
-webkit.org/b/249360 imported/w3c/web-platform-tests/fullscreen/api/element-ready-check-allowed-cross-origin.sub.html [ Failure ]
-
 webkit.org/b/249367 imported/w3c/web-platform-tests/html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transferrable.w.html [ Pass Failure ]
 
 webkit.org/b/249407 media/audioSession/getUserMedia.html [ Failure ]