Remove unused styles

resources/assets/styles/layouts/_front-page.scss

@@ -10,16 +10,6 @@ body.home {
     }
   }
 
-  .top-banner {
-    background-size: cover;
-    background-position: center;
-    z-index: 0;
-
-    .container {
-      z-index: 1;
-    }
-  }
-
   .intro-caption {
     bottom: 1em;
   }