Avoid returning objects passed by reference.

Objects are always passed by reference, so it doesn't make sense to
return an object which is passed by reference as it will always be the
same object. This change makes the code a bit more readable.

src/Wallabag/ImportBundle/Import/PocketImport.php

@@ -192,7 +192,7 @@ class PocketImport extends AbstractImport
         $entry->setUrl($url);
 
         // update entry with content (in case fetching failed, the given entry will be return)
-        $entry = $this->fetchContent($entry, $url);
+        $this->fetchContent($entry, $url);
 
         // 0, 1, 2 - 1 if the item is archived - 2 if the item should be deleted
         $entry->setArchived($importedEntry['status'] == 1 || $this->markAsRead);