Remove duplicate release note

PiperOrigin-RevId: 290600248

RELEASENOTES.md

@@ -50,8 +50,6 @@
   This issue caused FLAC streams with other bit depths to sound like white noise
   This issue caused FLAC streams with other bit depths to sound like white noise
   on earlier releases, but only when embedded in a non-FLAC container such as
   on earlier releases, but only when embedded in a non-FLAC container such as
   Matroska or MP4.
   Matroska or MP4.
-* Select multiple metadata tracks if multiple metadata renderers are available
-  ([#6676](https://github.com/google/ExoPlayer/issues/6676)).
 * Add support for ID3 genres added in Wimamp 5.6 (2010).
 * Add support for ID3 genres added in Wimamp 5.6 (2010).
 
 
 ### 2.11.1 (2019-12-20) ###
 ### 2.11.1 (2019-12-20) ###