[Gardening] [macOS] compositing/repaint/iframes/compositing-iframe-with-fixed-background-doc-repaint.html is flakily failing.

https://bugs.webkit.org/show_bug.cgi?id=274792
rdar://128884891

Unreviewed test gardening.

Modifying test expectation.

* LayoutTests/platform/mac-wk1/TestExpectations:
* LayoutTests/platform/mac/TestExpectations:

Canonical link: https://commits.webkit.org/289211@main

Author: karimiy21

LayoutTests/platform/mac-wk1/TestExpectations

@@ -2938,8 +2938,6 @@ webkit.org/b/260883 inspector/timeline/timeline-recording.html [ Skip ]
 
 webkit.org/b/274409 imported/w3c/web-platform-tests/content-security-policy/reporting-api/reporting-api-works-on-frame-src.https.sub.html [ Pass Failure ]
 
-webkit.org/b/274792 compositing/repaint/iframes/compositing-iframe-with-fixed-background-doc-repaint.html [ Pass Failure ]
-
 webkit.org/b/276145 http/tests/security/block-popup-to-all-zero-address.html [ Skip ]
 
 # rdar://124363343 ([ Sequoia+ ] Multiple WebKit tests failing after explicit "SameSite" attribute change)

LayoutTests/platform/mac/TestExpectations

@@ -2471,3 +2471,5 @@ webkit.org/b/285954 [ Ventura+ Debug ] inspector/worker/runtime-basic-subworker.
 webkit.org/b/286039 imported/w3c/web-platform-tests/scroll-to-text-fragment/scroll-to-text-fragment.html [ Pass Failure ]
 
 webkit.org/b/286107 [ Release ] imported/w3c/web-platform-tests/css/css-shapes/shape-outside/shape-image/shape-image-013.html [ Pass ImageOnlyFailure ]
+
+webkit.org/b/274792 compositing/repaint/iframes/compositing-iframe-with-fixed-background-doc-repaint.html [ Pass Failure ]