diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index d6b20be4e1..b645cc81a0 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -60,7 +60,6 @@
     ([#3406](https://github.com/google/ExoPlayer/issues/3406)).
 * New Leanback extension: Simplifies binding Exoplayer to Leanback UI
   components.
-* New Cast extension: Simplifies toggling between local and Cast playbacks.
 * Unit tests moved to Robolectric.
 * Misc bugfixes.