Remove per-platform baseline results for comment-in-textarea layout test.

webkit/tools/layout_tests/test_expectations.txt

 // This file consists of lines with specifications of what
 // to expect from layout test cases. The test cases can be directories
 // in which case the expectations apply to all test cases in that
 // directory and any subdirectory. The format of the file is along the
 // lines of:
 //
 // LayoutTests/fast/js/fixme.js = FAIL
 // LayoutTests/fast/js/flaky.js = FAIL PASS
 // LayoutTests/fast/js/crash.js = CRASH TIMEOUT FAIL PASS
 //
@@ skipping 2295 matching lines @@
 
 // Merge 41768:41807
 // Perhaps just needs new baseline?
 // These tests were rebaselined with failure long ago. We shouldn't do this, and
 // instead work upstream to improve tests so that they don't fail.
 // Linux-only failures
 BUG10458 LINUX : LayoutTests/editing/inserting/6633727.html = FAIL
 BUG10458 MAC : LayoutTests/fast/dom/java-applet-calls.html = FAIL
 // Just need rebaseline
 BUG10458 LINUX : LayoutTests/fast/forms/textarea-width.html = FAIL
-BUG10458 LINUX : LayoutTests/fast/parser/comment-in-textarea.html = FAIL
 
 // Missing expected results
 BUG10461 SKIP : LayoutTests/platform/mac/fast/text/international/Geeza-Pro-vertical-metrics-adjustment.html = PASS
 
 // New failures from merge
 BUG27486 WIN : LayoutTests/fast/forms/listbox-hit-test-zoomed.html = FAIL
 BUG27486 RELEASE LINUX : LayoutTests/fast/forms/listbox-hit-test-zoomed.html = FAIL
 BUG27486 LINUX DEBUG : LayoutTests/fast/forms/listbox-hit-test-zoomed.html = FAIL
 BUG27486 WIN LINUX : LayoutTests/fast/forms/slider-zoomed.html = FAIL
 
@@ skipping 645 matching lines @@
 
 // New tests. Failures from merge 51210:51325.
 BUG28646 : LayoutTests/editing/selection/transformed-selection-rects.html = FAIL
 
 // New failures from merge 51406:51410.
 BUG28905 : LayoutTests/http/tests/security/isolatedWorld/world-reuse.html = FAIL
 BUG28905 WONTFIX SKIP : LayoutTests/plugins/qt-qwidget-plugin.html = FAIL
 
 // New failures from merge 51412:51455.
 BUG28916 MAC : LayoutTests/editing/pasteboard/paste-xml.xhtml = IMAGE+TEXT
-BUG28916 WIN : LayoutTests/fast/parser/comment-in-textarea.html = TEXT
 BUG_HAMAJI WIN LINUX : LayoutTests/editing/selection/last-empty-inline.html = TEXT
 
 // Flaky test from r51224:r51237 roll.
 BUG28918 DEBUG : LayoutTests/storage/domstorage/localstorage/iframe-events.html = CRASH PASS
 
 // Flaky test added by r51350.
 BUG28918 : LayoutTests/http/tests/cache/subresource-failover-to-network.html = PASS TEXT