Deprecate --gfe2_reloadable_flag_quic_only_cancel_set_alarms

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 370d613f002eb7ae61ff6a14956c4d76f20af380..1594220e891f43576ba997ac2e03f689704fec2e 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -105,10 +105,6 @@ bool FLAGS_quic_ack_decimation2 = true;
 // If true, QUIC connections will defer responding to ACKs to their send alarms.
 bool FLAGS_quic_connection_defer_ack_response = true;
 
-// If true, calls to QuicAlarm::Cancel don't do anything  if the alarm is not
-// set.
-bool FLAGS_quic_only_cancel_set_alarms = true;
-
 // Simplify QUIC's write path for inplace encryption now that FEC is gone.
 bool FLAGS_quic_inplace_encryption2 = true;