chore(Build): SL no longer has Safari 5 on OSX?

Author: c0bra

lib/grunt/utils.js

@@ -81,7 +81,6 @@ var util = module.exports = {
       'SL_Safari_5': {
         base: 'SauceLabs',
         browserName: 'safari',
-        platform: 'Mac 10.6',
         version: '5'
       },
       'SL_Safari_6': {