Deprecate FLAGS_quic_reloadable_flag_quic_flow_control_faster_autotune.

net/quic/core/quic_flow_controller.cc

Index: net/quic/core/quic_flow_controller.cc
diff --git a/net/quic/core/quic_flow_controller.cc b/net/quic/core/quic_flow_controller.cc
index bf36c7a9ab07cb94b2b27b6a2757e1c2668dfbd0..b63349f966232ab158e0f6891929d92dce6e0ea2 100644
--- a/net/quic/core/quic_flow_controller.cc
+++ b/net/quic/core/quic_flow_controller.cc
@@ -186,9 +186,7 @@ void QuicFlowController::MaybeSendWindowUpdate() {
   QuicStreamOffset available_window = receive_window_offset_ - bytes_consumed_;
   QuicByteCount threshold = WindowUpdateThreshold();
 
-  if (FLAGS_quic_reloadable_flag_quic_flow_control_faster_autotune &&
-      !prev_window_update_time_.IsInitialized()) {
-    QUIC_FLAG_COUNT(quic_reloadable_flag_quic_flow_control_faster_autotune);
+  if (!prev_window_update_time_.IsInitialized()) {
     // Treat the initial window as if it is a window update, so if 1/2 the
     // window is used in less than 2 RTTs, the window is increased.
     prev_window_update_time_ = connection_->clock()->ApproximateNow();