diff --git a/TODO b/TODO
index fc7b07ee0..3c0839649 100644
--- a/TODO
+++ b/TODO
@@ -15,11 +15,6 @@ Offline list:
    not really a Handler in the normal sense. It's not built once and
    called repeatedly; it's built for every ServeHTTP request.
 
--- dev mode flag -thumbstress to stress thumbnail generation: drop all
-   thumbMeta keyvalue entries and also append a process random value
-   to thumbnails URLs to cache-bust browser. will force reload and
-   re-generation of all thumbnails
-
 -- unexport more stuff from pkg/server. Cache, etc.
 
 -- In ImageHandler.cache, write the thumbnail out as one large blob