Revert of Periodically update codec bit/frame rate settings.

webrtc/modules/video_coding/media_optimization.cc

Index: webrtc/modules/video_coding/media_optimization.cc
diff --git a/webrtc/modules/video_coding/media_optimization.cc b/webrtc/modules/video_coding/media_optimization.cc
index f0cbd62c9bf669d35578ea5f5f44284f5ffb8bc8..ccd23f6ae4729214639e45ed786979f36caf5455 100644
--- a/webrtc/modules/video_coding/media_optimization.cc
+++ b/webrtc/modules/video_coding/media_optimization.cc
@@ -118,13 +118,7 @@
   // Update encoding rates following protection settings.
   float target_video_bitrate_kbps =
       static_cast<float>(video_target_bitrate_) / 1000.0f;
-  float framerate = incoming_frame_rate_;
-  if (framerate == 0.0) {
-    // No framerate estimate available, use configured max framerate instead.
-    framerate = user_frame_rate_;
-  }
-
-  frame_dropper_->SetRates(target_video_bitrate_kbps, framerate);
+  frame_dropper_->SetRates(target_video_bitrate_kbps, incoming_frame_rate_);
 
   return video_target_bitrate_;
 }