Remove the now-unneeded top margin on some main page items

@@ -78,10 +78,6 @@
     color: #fff;
 }
 
-#adminmenuback, #adminmenuwrap, #wpbody-content {
-    margin-top: 66px;
-}
-
 #adminmenuback, #adminmenuwrap {
     padding-bottom: 3.2em;
 }