Removed shadow map sampling workaround on Metal as it is not needed anymore with iOS 8 beta 5.
Removed shadow map sampling workaround on Metal as it is not needed anymore with iOS 8 beta 5.

git-svn-id: 230be0fe96f8c3282125f61cec60fa6320039354@285 e658db38-2ae6-4b1c-8a17-0a8554443f32

hoholee12/Palleon,hoholee12/Palleon,hoholee12/Palleon,hoholee12/Palleon