Index: wp-includes/js/tinymce/themes/advanced/skins/wp_theme/content.css
===================================================================
--- wp-includes/js/tinymce/themes/advanced/skins/wp_theme/content.css	(revision 20124)
+++ wp-includes/js/tinymce/themes/advanced/skins/wp_theme/content.css	(working copy)
@@ -38,8 +38,6 @@
 
 /* WordPress styles */
 body {
-	font-family: sans-serif;
-	font-size: 13px;
 	line-height: 19px;
 	color: #333;
 	margin: 10px;