Remove channel ids from various interfaces.

webrtc/video/transport_adapter.h

Index: webrtc/video/transport_adapter.h
diff --git a/webrtc/video/transport_adapter.h b/webrtc/video/transport_adapter.h
index cd27d7cfe04f23ade91d981a38ba934901f4c58f..c9a7938546a78b5e76ccda3ca96e8a076eb0e0a1 100644
--- a/webrtc/video/transport_adapter.h
+++ b/webrtc/video/transport_adapter.h
@@ -21,10 +21,8 @@ class TransportAdapter : public webrtc::Transport {
  public:
   explicit TransportAdapter(newapi::Transport* transport);
 
-  int SendPacket(int /*channel*/, const void* packet, size_t length) override;
-  int SendRTCPPacket(int /*channel*/,
-                     const void* packet,
-                     size_t length) override;
+  int SendPacket(const void* packet, size_t length) override;
+  int SendRTCPPacket(const void* packet, size_t length) override;
 
   void Enable();
   void Disable();