Deprecate --quic_use_socket_timestamp.

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 36a335feab986b4b5e3c50967fcbd9ec516c798d..a9bf9c14b62bd5c9b651b66c7eb9e08e43146f74 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -92,10 +92,6 @@ 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;
 
-// Try to use the socket timestamp to determine the time a packet was
-// received instead of Now().
-bool FLAGS_quic_use_socket_timestamp = true;
-
 // Resend 0RTT requests in response to an REJ that re-establishes encryption.
 bool FLAGS_quic_reply_to_rej = true;