Remove unused log tag constant

PiperOrigin-RevId: 466025324
(cherry picked from commit 273cf086)

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/VideoTranscodingSamplePipeline.java

@@ -47,7 +47,6 @@ import org.checkerframework.dataflow.qual.Pure;
  * Pipeline to decode video samples, apply transformations on the raw samples, and re-encode them.
  * Pipeline to decode video samples, apply transformations on the raw samples, and re-encode them.
  */
  */
 /* package */ final class VideoTranscodingSamplePipeline implements SamplePipeline {
 /* package */ final class VideoTranscodingSamplePipeline implements SamplePipeline {
-  private static final String TAG = "VideoTranscodingSP";
 
 
   private final int maxPendingFrameCount;
   private final int maxPendingFrameCount;