Remove insecure QUIC support

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index 3aaeaba5ec908db09f5bf6058d40cca1572f4350..17a86d7c67847b4600f42e41dec1b184c943a014 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -262,7 +262,6 @@ QuicConnection::QuicConnection(QuicConnectionId connection_id,
                                const PacketWriterFactory& writer_factory,
                                bool owns_writer,
                                Perspective perspective,
-                               bool is_secure,
                                const QuicVersionVector& supported_versions)
     : framer_(supported_versions,
               helper->GetClock()->ApproximateNow(),
@@ -315,8 +314,7 @@ QuicConnection::QuicConnection(QuicConnectionId connection_id,
           clock_,
           &stats_,
           FLAGS_quic_use_bbr_congestion_control ? kBBR : kCubic,
-          FLAGS_quic_use_time_loss_detection ? kTime : kNack,
-          is_secure),
+          FLAGS_quic_use_time_loss_detection ? kTime : kNack),
       version_negotiation_state_(START_NEGOTIATION),
       perspective_(perspective),
       connected_(true),
@@ -325,7 +323,6 @@ QuicConnection::QuicConnection(QuicConnectionId connection_id,
       self_ip_changed_(false),
       self_port_changed_(false),
       can_truncate_connection_ids_(true),
-      is_secure_(is_secure),
       mtu_discovery_target_(0),
       mtu_probe_count_(0),
       packets_between_mtu_probes_(kPacketsBetweenMtuProbesBase),