Fix styles for login buttons in header

Author: Nick Litwin

assets/css/layout/header.scss

@@ -539,13 +539,8 @@
         padding-right: 0;
       }
 
-      a {
-        font-weight: normal;
-        padding: 8px 15px;
-
-        &:not(:last-child) {
-          margin-right: 12px;
-        }
+      a:not(:last-child) {
+        margin-right: 12px;
       }
     }
   }