Remove Javadoc TODO from README of decoder extensions

As most classes are used via interface only and people depending on it locally can always find the Javadoc in Android Studio directly, we don't plan to add Javadocs for these extensions module in developer.android.com.

PiperOrigin-RevId: 521993756

libraries/decoder_av1/README.md

@@ -128,6 +128,4 @@ GL rendering mode has better performance, so should be preferred
 
 *   [Troubleshooting using decoding extensions][]
 
-<!-- TODO(b/276289331): Add Javadoc link when it's published on developer.android.com -->
-
 [Troubleshooting using decoding extensions]: https://developer.android.com/guide/topics/media/exoplayer/troubleshooting#how-can-i-get-a-decoding-library-to-load-and-be-used-for-playbacks

libraries/decoder_ffmpeg/README.md

@@ -121,6 +121,4 @@ then implement your own logic to use the renderer for a given track.
 
 *   [Troubleshooting using decoding extensions][]
 
-<!-- TODO(b/276289331): Add Javadoc link when it's published on developer.android.com -->
-
 [Troubleshooting using decoding extensions]: https://developer.android.com/guide/topics/media/exoplayer/troubleshooting#how-can-i-get-a-decoding-library-to-load-and-be-used-for-playback

libraries/decoder_flac/README.md

@@ -100,6 +100,4 @@ player, then implement your own logic to use the renderer for a given track.
 
 *   [Troubleshooting using decoding extensions][]
 
-<!-- TODO(b/276289331): Add Javadoc link when it's published on developer.android.com -->
-
 [Troubleshooting using decoding extensions]: https://developer.android.com/guide/topics/media/exoplayer/troubleshooting#how-can-i-get-a-decoding-library-to-load-and-be-used-for-playback

libraries/decoder_opus/README.md

@@ -104,6 +104,4 @@ player, then implement your own logic to use the renderer for a given track.
 
 *   [Troubleshooting using decoding extensions][]
 
-<!-- TODO(b/276289331): Add Javadoc link when it's published on developer.android.com -->
-
 [Troubleshooting using decoding extensions]: https://developer.android.com/guide/topics/media/exoplayer/troubleshooting#how-can-i-get-a-decoding-library-to-load-and-be-used-for-playback

libraries/decoder_vp9/README.md

@@ -141,6 +141,4 @@ GL rendering mode has better performance, so should be preferred.
 
 *   [Troubleshooting using decoding extensions][]
 
-<!-- TODO(b/276289331): Add Javadoc link when it's published on developer.android.com -->
-
 [Troubleshooting using decoding extensions]: https://developer.android.com/guide/topics/media/exoplayer/troubleshooting#how-can-i-get-a-decoding-library-to-load-and-be-used-for-playback