Remove BaseRenderer#getUpdatedSourceDrmSession

This seems to be no longer used

PiperOrigin-RevId: 296856117

library/core/src/main/java/com/google/android/exoplayer2/BaseRenderer.java

@@ -15,16 +15,11 @@
  */
 package com.google.android.exoplayer2;
 
-import android.os.Looper;
 import androidx.annotation.Nullable;
 import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
-import com.google.android.exoplayer2.drm.DrmSession;
-import com.google.android.exoplayer2.drm.DrmSessionManager;
-import com.google.android.exoplayer2.drm.ExoMediaCrypto;
 import com.google.android.exoplayer2.source.SampleStream;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.MediaClock;
-import com.google.android.exoplayer2.util.Util;
 import java.io.IOException;
 
 /**
@@ -307,35 +302,6 @@ public abstract class BaseRenderer implements Renderer, RendererCapabilities {
     return configuration;
   }
 
-  /** Returns a {@link DrmSession} ready for assignment, handling resource management. */
-  @Nullable
-  protected final <T extends ExoMediaCrypto> DrmSession<T> getUpdatedSourceDrmSession(
-      @Nullable Format oldFormat,
-      Format newFormat,
-      @Nullable DrmSessionManager<T> drmSessionManager,
-      @Nullable DrmSession<T> existingSourceSession)
-      throws ExoPlaybackException {
-    boolean drmInitDataChanged =
-        !Util.areEqual(newFormat.drmInitData, oldFormat == null ? null : oldFormat.drmInitData);
-    if (!drmInitDataChanged) {
-      return existingSourceSession;
-    }
-    @Nullable DrmSession<T> newSourceDrmSession = null;
-    if (newFormat.drmInitData != null) {
-      if (drmSessionManager == null) {
-        throw createRendererException(
-            new IllegalStateException("Media requires a DrmSessionManager"), newFormat);
-      }
-      newSourceDrmSession =
-          drmSessionManager.acquireSession(
-              Assertions.checkNotNull(Looper.myLooper()), newFormat.drmInitData);
-    }
-    if (existingSourceSession != null) {
-      existingSourceSession.release();
-    }
-    return newSourceDrmSession;
-  }
-
   /**
    * Returns the index of the renderer within the player.
    */