Remove now-unused #adminmenushadow. see #25858.

git-svn-id: https://develop.svn.wordpress.org/trunk@26182 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/ie.css

@@ -38,10 +38,6 @@
 	font-size: 14px;
 }
 
-#adminmenushadow {
-	display: none;
-}
-
 #adminmenuback {
 	left: 0;
 	background-image: none;

src/wp-admin/css/wp-admin.css

@@ -1732,15 +1732,6 @@ form.upgrade .hint {
 	float: left;
 }
 
-#adminmenushadow {
-	position: absolute;
-	top: 0;
-	right: 0;
-	bottom: 0;
-	width: 6px;
-	z-index: 20;
-}
-
 /* side admin menu */
 #adminmenu * {
 	-webkit-user-select: none;

src/wp-admin/menu-header.php

@@ -176,7 +176,6 @@ function _wp_menu_output( $menu, $submenu, $submenu_as_parent = true ) {
 
 <div id="adminmenuback"></div>
 <div id="adminmenuwrap">
-<div id="adminmenushadow"></div>
 <ul id="adminmenu" role="navigation">
 
 <?php