[chromium] Unreviewed gardening.  Remove effect-reference-hw from test expectations, since it's now passing.
https://bugs.webkit.org/show_bug.cgi?id=104289

* platform/chromium/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@142291 268f45cc-cd09-0410-ab3c-d52691b4dbfc