Remove MimdRateControl and factories for RemoteBitrateEstimor.

webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc

Index: webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc
diff --git a/webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc b/webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc
index a1a9baf352038d29de47caba122cc98c2d73935f..81ab97367bb5ce322fb6e74368120bf9f1136ca4 100644
--- a/webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc
+++ b/webrtc/modules/remote_bitrate_estimator/aimd_rate_control.cc
@@ -21,6 +21,7 @@ namespace webrtc {
 static const int64_t kDefaultRttMs = 200;
 static const int64_t kLogIntervalMs = 1000;
 static const double kWithinIncomingBitrateHysteresis = 1.05;
+static const int64_t kMaxFeedbackIntervalMs = 1000;
 
 AimdRateControl::AimdRateControl(uint32_t min_bitrate_bps)
     : min_configured_bitrate_bps_(min_bitrate_bps),
@@ -41,10 +42,6 @@ AimdRateControl::AimdRateControl(uint32_t min_bitrate_bps)
       rtt_(kDefaultRttMs),
       time_of_last_log_(-1) {}
 
-RateControlType AimdRateControl::GetControlType() const {
-  return kAimdControl;
-}
-
 uint32_t AimdRateControl::GetMinBitrate() const {
   return min_configured_bitrate_bps_;
 }