[webkitgtk3] Remove unused patch

[Tomas Popela]

commit ff04d93e36b30b77c8c4c24f0502554a6efe99a6
Author: Tomas Popela <tpopela at redhat.com>
Date:   Wed Apr 17 09:15:43 2013 +0200

    Remove unused patch

 webkit-dom-casting.patch | 1846 ----------------------------------------------
 1 files changed, 0 insertions(+), 1846 deletions(-)