Delete unused methods from vcm::VideoCodingModule.

Bug: None
Change-Id: Ia6871d486b507a08f4303d1f0da00829afbebb0e
Reviewed-on: https://webrtc-review.googlesource.com/62101
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22469}

modules/video_coding/video_coding_impl.h

@@ -78,9 +78,6 @@ class VideoSender {
                                uint8_t payloadType,
                                bool internalSource);
 
-  int Bitrate(unsigned int* bitrate) const;
-  int FrameRate(unsigned int* framerate) const;
-
   // Update the channel parameters based on new rates and rtt. This will also
   // cause an immediate call to VideoEncoder::SetRateAllocation().
   int32_t SetChannelParameters(
@@ -99,10 +96,6 @@ class VideoSender {
       VideoBitrateAllocator* bitrate_allocator,
       VideoBitrateAllocationObserver* bitrate_updated_callback);
 
-  // Deprecated:
-  // TODO(perkj): Remove once no projects use it.
-  int32_t RegisterProtectionCallback(VCMProtectionCallback* protection);
-
   int32_t AddVideoFrame(const VideoFrame& videoFrame,
                         const CodecSpecificInfo* codecSpecificInfo);