Remove fec and entropy from per-packet QUIC logging, now that they're obsolete.

net/quic/quic_connection_logger.cc

Index: net/quic/quic_connection_logger.cc
diff --git a/net/quic/quic_connection_logger.cc b/net/quic/quic_connection_logger.cc
index 232b0e3372f4787cb950aa278df2f6def0a7b848..f27ba0806196e963484e83a00b695008413bbb8c 100644
--- a/net/quic/quic_connection_logger.cc
+++ b/net/quic/quic_connection_logger.cc
@@ -93,8 +93,6 @@ std::unique_ptr<base::Value> NetLogQuicPacketHeaderCallback(
   dict->SetInteger("reset_flag", header->public_header.reset_flag);
   dict->SetInteger("version_flag", header->public_header.version_flag);
   dict->SetString("packet_number", base::Uint64ToString(header->packet_number));
-  dict->SetInteger("entropy_flag", header->entropy_flag);
-  dict->SetInteger("fec_flag", header->fec_flag);
   return std::move(dict);
 }