diff --git a/extensions/vp9/proguard-rules.txt b/extensions/vp9/proguard-rules.txt
index 6e473eb21e..56fca12d19 100644
--- a/extensions/vp9/proguard-rules.txt
+++ b/extensions/vp9/proguard-rules.txt
@@ -10,8 +10,3 @@
     *;
 }
 
-# The deprecated VpxOutputBuffer might be used by old binary versions. Remove
-# once VpxOutputBuffer is removed.
--keep class com.google.android.exoplayer2.ext.vp9.VpxOutputBuffer {
-    *;
-}
diff --git a/extensions/vp9/src/main/java/com/google/android/exoplayer2/ext/vp9/VpxOutputBuffer.java b/extensions/vp9/src/main/java/com/google/android/exoplayer2/ext/vp9/VpxOutputBuffer.java
deleted file mode 100644
index 6d36164d1d..0000000000
--- a/extensions/vp9/src/main/java/com/google/android/exoplayer2/ext/vp9/VpxOutputBuffer.java
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.google.android.exoplayer2.ext.vp9;
-
-import com.google.android.exoplayer2.video.VideoDecoderOutputBuffer;
-
-// TODO(b/139174707): Delete this class once binaries in WVVp9OpusPlaybackTest are updated to depend
-// on VideoDecoderOutputBuffer. Also mark VideoDecoderOutputBuffer as final and remove proguard
-// config for VpxOutputBuffer.
-/**
- * Video output buffer, populated by {@link VpxDecoder}.
- *
- * @deprecated Use {@link VideoDecoderOutputBuffer} instead.
- */
-@Deprecated
-public final class VpxOutputBuffer extends VideoDecoderOutputBuffer {
-
-  /**
-   * Creates VpxOutputBuffer.
-   *
-   * @param owner Buffer owner.
-   */
-  public VpxOutputBuffer(Owner<VideoDecoderOutputBuffer> owner) {
-    super(owner);
-  }
-}