Remove more tests from the Skipped list that were skipped early on with a bunch of eventSender
related tests and then not unskipped when various parts of eventSender got implemented in
WebKitTestRunner.

* platform/mac-wk2/TestExpectations:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148637 268f45cc-cd09-0410-ab3c-d52691b4dbfc