btrfs: defrag: use simple list_del() in defrag_collect_targets()

When freeing the entries from the list there is no need to initialize
the list member in an entry, since we are immediately freeing it. So use
simple list_del() instead of list_del_init().

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>

Author: fdmanana

fs/btrfs/defrag.c

@@ -1093,7 +1093,7 @@ static int defrag_collect_targets(struct btrfs_inode *inode,
 		struct defrag_target_range *tmp;
 
 		list_for_each_entry_safe(entry, tmp, target_list, list) {
-			list_del_init(&entry->list);
+			list_del(&entry->list);
 			kfree(entry);
 		}
 	}