Deprecate RTPFragmentationHeader argument to AudioPacketizationCallback::SendData

It appears unused everywhere. It will be deleted in a followup cl.

Bug: webrtc:6471
Change-Id: Ief992db6e52aee3cf1bc77ffd659ffbc072672ba
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/134212
Reviewed-by: Oskar Sundbom <ossu@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27787}
diff --git a/modules/audio_coding/test/EncodeDecodeTest.h b/modules/audio_coding/test/EncodeDecodeTest.h
index 6dc7bc9..ec95766 100644
--- a/modules/audio_coding/test/EncodeDecodeTest.h
+++ b/modules/audio_coding/test/EncodeDecodeTest.h
@@ -32,8 +32,7 @@
                    const uint8_t payloadType,
                    const uint32_t timeStamp,
                    const uint8_t* payloadData,
-                   const size_t payloadSize,
-                   const RTPFragmentationHeader* fragmentation) override;
+                   const size_t payloadSize) override;
 
  private:
   static void MakeRTPheader(uint8_t* rtpHeader, uint8_t payloadType,