Remove V8 attribtues from IDLAttributes.txt
https://bugs.webkit.org/show_bug.cgi?id=114651

Reviewed by Sam Weinig.

No tests because no behavior change is expected.

* bindings/scripts/IDLAttributes.txt: Remove V8 attribtues.
* html/track/TextTrackList.idl: Remove a stray V8-specific attribute
(so I guess this change is not useless)


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@148486 268f45cc-cd09-0410-ab3c-d52691b4dbfc