Fix a webkit TestExpectations lint error

By removing line 5921 which is redundant given line 5343.

Bug: None
Change-Id: I3f5edf7756a53586c48023980921c5aa3bc0246a
TBR: jonross@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2230623Reviewed-by: Martin Šrámek <msramek@chromium.org>
Commit-Queue: Martin Šrámek <msramek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#775061}

third_party/blink/web_tests/TestExpectations

@@ -5918,7 +5918,6 @@ crbug.com/1011811 http/tests/devtools/persistence/automapping-sourcemap.js [ Pas
 crbug.com/1088441 [ Mac ] http/tests/loading/bad-server-subframe.html [ Pass Failure ]
 crbug.com/1090822 [ Mac10.10 ] virtual/cascade/fast/forms/month/month-appearance-basic.html [ Pass Failure ]
 crbug.com/1083293 [ Linux ] media/video-aspect-ratio.html [ Pass Failure ]
-crbug.com/1027434 [ Mac10.13 ] virtual/not-site-per-process/external/wpt/html/browsers/origin/cross-origin-objects/cross-origin-objects.html [ Pass Timeout ]
 
 # Sheriff 2020-06-04
 crbug.com/1041973 virtual/web-components-v0-disabled/external/wpt/html/semantics/forms/constraints/form-validation-reportValidity.html [ Pass Failure Timeout ]