Revert [21495]. Discussed in dev-chat: it's better if the themes implement this or something similar.

git-svn-id: https://develop.svn.wordpress.org/trunk@21532 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/js/tinymce/themes/advanced/skins/wp_theme/content.css

@@ -37,18 +37,12 @@ font[face=mceinline] {font-family:inherit !important}
 .mcePageBreak {display:block;border:0;width:100%;height:12px;border-top:1px dotted #ccc;margin-top:15px;background:#fff url(../../img/pagebreak.gif) no-repeat center top;}
 
 /* WordPress styles */
-html {
-	background: url('img/white.png') repeat-y center top;
-	background-color: #f5f5f5;
-}
-
 body {
 	font-family: Georgia, "Times New Roman", "Bitstream Charter", Times, serif;
 	font-size: 13px;
 	line-height: 19px;
 	color: #333;
-	margin: 15px auto;
-	max-width: 600px;
+	margin: 10px;
 }
 
 br[data-mce-bogus] {