Deprecate --quic_stateless_version_negotiation

net/quic/quic_flags.cc

Index: net/quic/quic_flags.cc
diff --git a/net/quic/quic_flags.cc b/net/quic/quic_flags.cc
index 6c3ad2b14449d9da0eb03e600ae692b7b2066d0e..0f02ed6bfc401e2216c3e1f9933ed344fee782e8 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -85,10 +85,6 @@ bool FLAGS_quic_crypto_server_config_default_has_chacha20 = true;
 // If true, QUIC will use newly refactored TCP sender code.
 bool FLAGS_quic_use_new_tcp_sender = true;
 
-// If true, the QUIC dispatcher will directly send version negotiation packets
-// without needing to create a QUIC session first.
-bool FLAGS_quic_stateless_version_negotiation = true;
-
 // If true, QUIC connections will defer responding to ACKs to their send alarms.
 bool FLAGS_quic_connection_defer_ack_response = true;