Twenty Twelve: remove unneeded float rule from nav list items, there is nothing to override here.

Also allows authors to assign CSS classes and float menu items with something like `alignright`.


git-svn-id: http://core.svn.wordpress.org/trunk@21665 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentytwelve/style.css

@@ -523,7 +523,6 @@ a:hover {
 	font-size: 12px;
 	font-size: 0.857142857rem;
 	line-height: 1.42857143;
-	float: none;
 }
 .main-navigation a {
 	color: #5e5e5e;