Remove no longer needed property access hacks.
Remove no longer needed property access hacks.

designcity/silverstripe-gridfieldextensions,kinglozzer/silverstripe-gridfieldextensions,SilbinaryWolf/silverstripe-gridfieldextensions,symbiote/silverstripe-gridfieldextensions,dhensby/silverstripe-gridfieldextensions,nikrolls/silverstripe-gridfieldextensions,kinglozzer/silverstripe-gridfieldextensions,designcity/silverstripe-gridfieldextensions,tractorcow/silverstripe-gridfieldextensions,dhensby/silverstripe-gridfieldextensions,SilbinaryWolf/silverstripe-gridfieldextensions,symbiote/silverstripe-gridfieldextensions,tractorcow/silverstripe-gridfieldextensions,silverstripe-australia/silverstripe-gridfieldextensions,sheadawson/silverstripe-gridfieldextensions,sheadawson/silverstripe-gridfieldextensions,muskie9/silverstripe-gridfieldextensions,muskie9/silverstripe-gridfieldextensions,nikrolls/silverstripe-gridfieldextensions,silverstripe-australia/silverstripe-gridfieldextensions