Remove some unused CSS

Author: QuLogic

docs/_static/css/landing.css

@@ -181,7 +181,7 @@ a.link--offsite::after {
 }
 
 @media (max-width: 700px) {
-  .quicklink-icon {
+  .quicklinks__icon {
     width: 60px;
   }
   .quicklinks a {
@@ -212,10 +212,6 @@ a.link--offsite::after {
   margin: 1em 0 .5em;
 }
 
-.news__item--highlight .title{
-  margin: .5em 0 1em;
-}
-
 .date{
   font-size: small;
 }