Remove non-existent entries in TestExpectations

This was making Tools/Scripts/lint-test-expectations unhappy!

TBR=haraken
BUG=

Review URL: https://codereview.chromium.org/13871012

git-svn-id: svn://svn.chromium.org/blink/trunk@148464 bbb929c8-8fbe-4397-9dbb-9b2b20218538