Remove failure expecations for Error serialization web tests

These were added to avoid failures during landing a CL in V8, which has
been done.

Bug: 1030086
Change-Id: I191b2346303186d5ae5fc129c39ba28a2e762b37
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1999889
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Adam Rice <ricea@chromium.org>
Auto-Submit: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Adam Rice <ricea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#731097}

third_party/blink/web_tests/TestExpectations

@@ -6399,9 +6399,6 @@ crbug.com/1018640 external/wpt/web-bundle/* [ Skip ]
 crbug.com/1038656 [ Mac ] http/tests/devtools/coverage/coverage-view-unused.js [ Pass Failure ]
 crbug.com/1038656 [ Win ] http/tests/devtools/coverage/coverage-view-unused.js [ Pass Failure ]
 
-crbug.com/1030086 external/wpt/html/infrastructure/safe-passing-of-structured-data/structured-cloning-error-extra.html [ Pass Failure ]
-crbug.com/1030086 external/wpt/html/infrastructure/safe-passing-of-structured-data/structuredclone_0.html [ Pass Failure ]
-
 # Temporarily disabled to land Linkifier changes in DevTools
 crbug.com/963183 http/tests/devtools/jump-to-previous-editing-location.js [ Pass Failure ]