Revert inadvertantly committed test changes.

* editing/pasteboard/copy-null-characters.html:
* fast/events/scroll-event-does-not-bubble.html:
* platform/mac-wk2/Skipped:
* transitions/remove-transition-style.html:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76094 268f45cc-cd09-0410-ab3c-d52691b4dbfc