Dialog: Remove leftover backcompat flag in tests

Author: scottgonzalez

tests/unit/dialog/dialog.html

@@ -5,9 +5,6 @@
 	<title>jQuery UI Dialog Test Suite</title>
 
 	<script src="../../jquery.js"></script>
-	<script>
-	$.uiBackCompat = false;
-	</script>
 	<link rel="stylesheet" href="../../../external/qunit/qunit.css">
 	<script src="../../../external/qunit/qunit.js"></script>
 	<script src="../../../external/jquery-simulate/jquery.simulate.js"></script>