Deprectate --quic_ignore_srbf

net/quic/quic_sent_packet_manager.cc

Index: net/quic/quic_sent_packet_manager.cc
diff --git a/net/quic/quic_sent_packet_manager.cc b/net/quic/quic_sent_packet_manager.cc
index 33e79fec8772c65adcd7e6b5f814231888a06c8b..832ca5d165948256eeb768ba8c1f991d75f42d32 100644
--- a/net/quic/quic_sent_packet_manager.cc
+++ b/net/quic/quic_sent_packet_manager.cc
@@ -163,14 +163,6 @@ void QuicSentPacketManager::SetFromConfig(const QuicConfig& config) {
       config.HasClientSentConnectionOption(kUNDO, perspective_)) {
     undo_pending_retransmits_ = true;
   }
-  if (!FLAGS_quic_ignore_srbf && config.HasReceivedSocketReceiveBuffer()) {
-    receive_buffer_bytes_ =
-        max(kMinSocketReceiveBuffer,
-            static_cast<QuicByteCount>(config.ReceivedSocketReceiveBuffer()));
-    QuicByteCount max_cwnd_bytes = static_cast<QuicByteCount>(
-        receive_buffer_bytes_ * kConservativeReceiveBufferFraction);
-    send_algorithm_->SetMaxCongestionWindow(max_cwnd_bytes);
-  }
   send_algorithm_->SetFromConfig(config, perspective_);
 
   if (network_change_visitor_ != nullptr) {