Remove unused protected received_packet_manager_ accessor in

net/quic/quic_connection.h

Index: net/quic/quic_connection.h
diff --git a/net/quic/quic_connection.h b/net/quic/quic_connection.h
index 29fa2793bb4e54865e3bb7155910cafd62b8ed84..c5d93d706ceafb360464155b31b68a5a71c97465 100644
--- a/net/quic/quic_connection.h
+++ b/net/quic/quic_connection.h
@@ -544,10 +544,6 @@ class NET_EXPORT_PRIVATE QuicConnection
 
   bool peer_port_changed() const { return peer_port_changed_; }
 
-  const QuicReceivedPacketManager& received_packet_manager() const {
-    return received_packet_manager_;
-  }
-
   QuicPacketSequenceNumber sequence_number_of_last_sent_packet() const {
     return sequence_number_of_last_sent_packet_;
   }