removing leftover amo style rules

headerfooter.css

@@ -1,6 +1,4 @@
-#header:after,
-.amo-header:after,
-.header-search form:after {
+#header:after {
     content: ".";
     display: block;
     clear: both;
@@ -8,14 +6,6 @@
     visibility: hidden;
 }
 
-
-@font-face { 
-    font-family: 'MetaBlack';
-    src: url('https://www.mozilla.com/img/fonts/MetaWebPro-Black.woff') format('woff');
-    font-weight: bold; 
-    font-style: normal;
-}
-
 /*----------------------------------
     Header
 ----------------------------------*/