Remove pre-renderer-migration workarounds in SampleQueue

They are no longer necessary.

PiperOrigin-RevId: 296193350

library/core/src/main/java/com/google/android/exoplayer2/source/SampleQueue.java

@@ -775,13 +775,6 @@ public class SampleQueue implements TrackOutput {
     boolean isFirstFormat = downstreamFormat == null;
     @Nullable DrmInitData oldDrmInitData = isFirstFormat ? null : downstreamFormat.drmInitData;
     downstreamFormat = newFormat;
-    if (drmSessionManager == DrmSessionManager.DUMMY) {
-      // Avoid attempting to acquire a session using the dummy DRM session manager. It's likely that
-      // the media source creation has not yet been migrated and the renderer can acquire the
-      // session for the read DRM init data.
-      // TODO: Remove once renderers are migrated [Internal ref: b/122519809].
-      return;
-    }
     @Nullable DrmInitData newDrmInitData = newFormat.drmInitData;
     outputFormatHolder.drmSession = currentDrmSession;
     if (!isFirstFormat && Util.areEqual(oldDrmInitData, newDrmInitData)) {
@@ -811,12 +804,6 @@ public class SampleQueue implements TrackOutput {
    * @return Whether it's possible to read the next sample.
    */
   private boolean mayReadSample(int relativeReadIndex) {
-    if (drmSessionManager == DrmSessionManager.DUMMY) {
-      // TODO: Remove once renderers are migrated [Internal ref: b/122519809].
-      // For protected content it's likely that the DrmSessionManager is still being injected into
-      // the renderers. We assume that the renderers will be able to acquire a DrmSession if needed.
-      return true;
-    }
     return currentDrmSession == null
         || currentDrmSession.getState() == DrmSession.STATE_OPENED_WITH_KEYS
         || ((flags[relativeReadIndex] & C.BUFFER_FLAG_ENCRYPTED) == 0