Remove date normalization code once YUI releases the appropriate fix

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: None
• Fix Version/s: master, master-deprecated, 3.0.x, 3.1.x
• Component/s: DatePicker
• Labels: None
• Git Pull Request: https://github.com/eduardolundgren/alloy-ui/pull/549

https://github.com/yui/yui3/pull/1752 was merged by YUI, so once it's released we should update Alloy's YUI version to include it and remove the extra code we have on our side to fix this same issue (https://github.com/eduardolundgren/alloy-ui/pull/444)