Issue #2104435 by cosmicdreams: Fixed Unreachable return statement in AggregatorFeedBlock.php.

core/modules/aggregator/lib/Drupal/aggregator/Plugin/Block/AggregatorFeedBlock.php

@@ -155,7 +155,6 @@ public function build() {
         return array(
           '#children' => drupal_render($item_list) . $read_more,
         );
-        return $build;
       }
     }
   }