Add to README of common repo
Reviewed-by: Eric Boren <email@example.com>
diff --git a/README b/README
index c6bc70c..9b85994 100644
@@ -1,3 +1,9 @@
+NOTE: REPO IS UNUSED. IT IS ONLY KEPT AROUND BECAUSE OLDER VERSIONS OF SKIA
+STILL REFER TO IT IN THEIR DEPS.
+TODO(rmistry): Delete this repo after the branches that depend on it scroll out of
+the supported branches window.
This repository contains code shared by the skia and skia-buildbot repositories.
The file layout is done by language, such as the following directories