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_unittest.cc b/modules/video_coding/receiver_unittest.cc
index bf77ba4..2d9a92e 100644
--- a/modules/video_coding/receiver_unittest.cc
+++ b/modules/video_coding/receiver_unittest.cc
@@ -37,7 +37,7 @@
         new StreamGenerator(0, clock_->TimeInMilliseconds()));
   }
 
-  virtual void SetUp() { receiver_.Reset(); }
+  virtual void SetUp() {}
 
   int32_t InsertPacket(int index) {
     VCMPacket packet;
@@ -378,7 +378,7 @@
             std::unique_ptr<EventWrapper>(
                 new FrameInjectEvent(&clock_, true))) {}
 
-  virtual void SetUp() { receiver_.Reset(); }
+  virtual void SetUp() {}
 
   SimulatedClockWithFrames clock_;
   StreamGenerator stream_generator_;