Delete some dead code in vcm::VideoReceiver and VCMReceiver

Bug: None
Change-Id: I9cb8bd57af697762a9fc76007e139695afaf1fa4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/152381
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29134}
diff --git a/modules/video_coding/receiver.cc b/modules/video_coding/receiver.cc
index 4c753a5..855ece8 100644
--- a/modules/video_coding/receiver.cc
+++ b/modules/video_coding/receiver.cc
@@ -46,22 +46,13 @@
       timing_(timing),
       render_wait_event_(std::move(receiver_event)),
       max_video_delay_ms_(kMaxVideoDelayMs) {
-  Reset();
+  jitter_buffer_.Start();
 }
 
 VCMReceiver::~VCMReceiver() {
   render_wait_event_->Set();
 }
 
-void VCMReceiver::Reset() {
-  rtc::CritScope cs(&crit_sect_);
-  if (!jitter_buffer_.Running()) {
-    jitter_buffer_.Start();
-  } else {
-    jitter_buffer_.Flush();
-  }
-}
-
 int32_t VCMReceiver::InsertPacket(const VCMPacket& packet) {
   // Insert the packet into the jitter buffer. The packet can either be empty or
   // contain media at this point.
@@ -84,11 +75,6 @@
   return VCM_OK;
 }
 
-void VCMReceiver::TriggerDecoderShutdown() {
-  jitter_buffer_.Stop();
-  render_wait_event_->Set();
-}
-
 VCMEncodedFrame* VCMReceiver::FrameForDecoding(uint16_t max_wait_time_ms,
                                                bool prefer_late_decoding) {
   const int64_t start_time_ms = clock_->TimeInMilliseconds();