Datepicker: Use simple split instead of globalize for parsing attributes

This reverts commit ea986f2.

Author: fnagel

Gruntfile.js

@@ -450,7 +450,6 @@ grunt.registerTask( "compile-globalize", function() {
 			globalize.dateParser( { date: "long" } ),
 			globalize.dateFormatter( { date: "full" } ),
 			globalize.dateParser( { date: "full" } ),
-			globalize.dateParser( { raw: "yyyy-MM-dd" } ),
 			globalize.numberParser()
 		]);