reverted:
--- b/core/modules/aggregator/aggregator.module
+++ a/core/modules/aggregator/aggregator.module
@@ -107,6 +107,11 @@
         'description' => t('A more link to the feed detail page'),
         'weight' => 5,
       ),
+      'feed_icon' => array(
+        'label' => t('Feed icon'),
+        'description' => t('An icon that links to the feed url'),
+        'weight' => 6,
+      ),
     ),
   );