Widget: Remove leftover back-compat handling for widget instance storage (see #8801).

Author: scottgonzalez

ui/jquery.ui.widget.js

@@ -271,9 +271,6 @@ $.Widget.prototype = {
 		// all event bindings should go through this._on()
 		this.element
 			.unbind( this.eventNamespace )
-			// 1.9 BC for #7810
-			// TODO remove dual storage
-			.removeData( this.widgetName )
 			.removeData( this.widgetFullName )
 			// support: jquery <1.6.3
 			// http://bugs.jquery.com/ticket/9413