relnote: Deprecate FLAGS_quic_time_wait_list_manager_use_shared_writer.

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 654891fd129d9cd5d0f03e5f1f1cbe76ee6e1ca1..5818a624221a61a6fc824280bae26ea2c3f76fff 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -128,10 +128,6 @@ bool FLAGS_quic_utils_use_fast_incremental_hash = true;
 // strike register.
 bool FLAGS_require_strike_register_or_server_nonce = true;
 
-// If true, use the shared writer directly for QuicTimeWaitListManagers instead
-// of creating a wrapper object.
-bool FLAGS_quic_time_wait_list_manager_use_shared_writer = true;
-
 // When turn on, log packet loss into transport connection stats LossEvent.
 bool FLAGS_quic_log_loss_event = true;