Remove unnecessary parameter and local variables

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=144427132

library/src/main/java/com/google/android/exoplayer2/source/dash/DashWrappingSegmentIndex.java

@@ -28,9 +28,8 @@ import com.google.android.exoplayer2.source.dash.manifest.RangedUri;
 
   /**
    * @param chunkIndex The {@link ChunkIndex} to wrap.
-   * @param uri The URI where the data is located.
    */
-  public DashWrappingSegmentIndex(ChunkIndex chunkIndex, String uri) {
+  public DashWrappingSegmentIndex(ChunkIndex chunkIndex) {
     this.chunkIndex = chunkIndex;
   }
 

library/src/main/java/com/google/android/exoplayer2/source/dash/DefaultDashChunkSource.java

@@ -185,10 +185,9 @@ public class DefaultDashChunkSource implements DashChunkSource {
     }
     if (pendingInitializationUri != null || pendingIndexUri != null) {
       // We have initialization and/or index requests to make.
-      Chunk initializationChunk = newInitializationChunk(representationHolder, dataSource,
+      out.chunk = newInitializationChunk(representationHolder, dataSource,
           trackSelection.getSelectedFormat(), trackSelection.getSelectionReason(),
           trackSelection.getSelectionData(), pendingInitializationUri, pendingIndexUri);
-      out.chunk = initializationChunk;
       return;
     }
 
@@ -233,10 +232,9 @@ public class DefaultDashChunkSource implements DashChunkSource {
     }
 
     int maxSegmentCount = Math.min(maxSegmentsPerLoad, lastAvailableSegmentNum - segmentNum + 1);
-    Chunk nextMediaChunk = newMediaChunk(representationHolder, dataSource,
-        trackSelection.getSelectedFormat(), trackSelection.getSelectionReason(),
-        trackSelection.getSelectionData(), sampleFormat, segmentNum, maxSegmentCount);
-    out.chunk = nextMediaChunk;
+    out.chunk = newMediaChunk(representationHolder, dataSource, trackSelection.getSelectedFormat(),
+        trackSelection.getSelectionReason(), trackSelection.getSelectionData(), sampleFormat,
+        segmentNum, maxSegmentCount);
   }
 
   @Override
@@ -255,8 +253,7 @@ public class DefaultDashChunkSource implements DashChunkSource {
       if (representationHolder.segmentIndex == null) {
         SeekMap seekMap = initializationChunk.getSeekMap();
         if (seekMap != null) {
-          representationHolder.segmentIndex = new DashWrappingSegmentIndex((ChunkIndex) seekMap,
-              initializationChunk.dataSpec.uri.toString());
+          representationHolder.segmentIndex = new DashWrappingSegmentIndex((ChunkIndex) seekMap);
         }
       }
     }