Remove unnecessary reset() method.

pageHeader.headerArray is only used in getNextSeekPosition()
in which populatePageHeader() resets them both at the beginning
anyway.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=120902428

library/src/main/java/com/google/android/exoplayer/extractor/ogg/OggSeeker.java

@@ -47,14 +47,6 @@ import java.io.IOException;
   }
 
   /**
-   * Resets this {@code OggSeeker}.
-   */
-  public void reset() {
-    pageHeader.reset();
-    headerArray.reset();
-  }
-
-  /**
    * Returns a position converging to the {@code targetGranule} to which the {@link ExtractorInput}
    * has to seek and then be passed for another call until -1 is return. If -1 is returned the
    * input is at a position which is before the start of the page before the target page and at

library/src/main/java/com/google/android/exoplayer/extractor/ogg/VorbisReader.java

@@ -116,7 +116,6 @@ import java.util.ArrayList;
         previousPacketBlockSize = vorbisIdHeader.blockSize0;
         // we're never at the first packet after seeking
         seenFirstAudioPacket = true;
-        oggSeeker.reset();
       }
     }