Remove unnecessary NeedsRebaseline lines from testExpectations

Remove a bunch of leftover/obsolete NeedsRebaseline lines from
TestExpectations.

TBR=ojan@chromium.org
BUG=

Review URL: https://codereview.chromium.org/102483003

git-svn-id: svn://svn.chromium.org/blink/trunk@163391 bbb929c8-8fbe-4397-9dbb-9b2b20218538