Minor style tweak

Author: vhardy

css3-transforms/alternate-spec-style.css

@@ -340,7 +340,6 @@ table.values-desc td:first-child {
 #div-head > h1:before {
     content: '';
     background-image: url(http://www.w3.org/2008/site/images/logo-w3c-mobile-lg);
-    background-color: gray;
     display: block;
     width: 90px;
     height: 53px;