Remove stats for recording reno vs cubic mode in internal server's varz.

net/quic/quic_connection_stats.h

Index: net/quic/quic_connection_stats.h
diff --git a/net/quic/quic_connection_stats.h b/net/quic/quic_connection_stats.h
index da3b4451b95c22e05549ccc74c3c9f1325d274ab..433085ab8e85dbdaba12a23a958642b822ff5775 100644
--- a/net/quic/quic_connection_stats.h
+++ b/net/quic/quic_connection_stats.h
@@ -56,7 +56,6 @@ struct NET_EXPORT_PRIVATE QuicConnectionStats {
   size_t loss_timeout_count;
   size_t tlp_count;
   size_t rto_count;  // Count of times the rto timer fired.
-  size_t spurious_rto_count;
 
   int64 min_rtt_us;  // Minimum RTT in microseconds.
   int64 srtt_us;  // Smoothed RTT in microseconds.
@@ -75,10 +74,6 @@ struct NET_EXPORT_PRIVATE QuicConnectionStats {
   // The number of loss events from TCP's perspective.  Each loss event includes
   // one or more lost packets.
   uint32 tcp_loss_events;
-  // Total amount of cwnd increase by TCPCubic in congestion avoidance.
-  QuicPacketCount cwnd_increase_congestion_avoidance;
-  // Total amount of cwnd increase by TCPCubic in cubic mode.
-  QuicPacketCount cwnd_increase_cubic_mode;
 
   // Creation time, as reported by the QuicClock.
   QuicTime connection_creation_time;