Temporarily backing out commit bd474799bf.

src/event.js

@@ -1069,11 +1069,6 @@ function liveHandler( event ) {
 		return;
 	}
 	
-	// IE will still dispatch events on disabled elements, so halt it (#6911)
-	if( event.target.disabled ) {
-		return;
-	}
-
 	if ( event.namespace ) {
 		namespace = new RegExp("(^|\\.)" + event.namespace.split(".").join("\\.(?:.*\\.)?") + "(\\.|$)");
 	}