[Qt] storage/open-database-creation-callback-isolated-world.html was removed
from tree by r55488, so it should be removed from Qt Skipped list too.

* platform/qt/Skipped: storage/open-database-creation-callback-isolated-world.html removed.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@55527 268f45cc-cd09-0410-ab3c-d52691b4dbfc