Delete unused method VideoCodingModule::DiscardedPackets().

webrtc/modules/video_coding/include/video_coding.h

Index: webrtc/modules/video_coding/include/video_coding.h
diff --git a/webrtc/modules/video_coding/include/video_coding.h b/webrtc/modules/video_coding/include/video_coding.h
index 27af381bd45f1fee15ad809d2ca971e125a9fbb3..d7e2eaf749ff3453ccd6ad2133ccb82091baa8a9 100644
--- a/webrtc/modules/video_coding/include/video_coding.h
+++ b/webrtc/modules/video_coding/include/video_coding.h
@@ -406,12 +406,6 @@ class VideoCodingModule : public Module {
   //                     < 0,               on error.
   virtual int32_t Delay() const = 0;
 
-  // Returns the number of packets discarded by the jitter buffer due to being
-  // too late. This can include duplicated packets which arrived after the
-  // frame was sent to the decoder. Therefore packets which were prematurely
-  // NACKed will be counted.
-  virtual uint32_t DiscardedPackets() const = 0;
-
   // Robustness APIs
 
   // Set the receiver robustness mode. The mode decides how the receiver