Deprecating FLAGS_quic_attach_ack_notifiers_to_packets.

net/tools/quic/end_to_end_test.cc

Index: net/tools/quic/end_to_end_test.cc
diff --git a/net/tools/quic/end_to_end_test.cc b/net/tools/quic/end_to_end_test.cc
index 9e7605f6df19b6ed2ff0909caa6adc995eb33df9..2478b84ae95921a63f030e7dec11ba66c0968281 100644
--- a/net/tools/quic/end_to_end_test.cc
+++ b/net/tools/quic/end_to_end_test.cc
@@ -1406,9 +1406,6 @@ TEST_P(EndToEndTest, AckNotifierWithPacketLossAndBlockedSocket) {
   // socket,  an AckNotifierDelegate will get informed that the data it is
   // interested in has been ACKed. This tests end-to-end ACK notification, and
   // demonstrates that retransmissions do not break this functionality.
-  ValueRestore<bool> old_flag(&FLAGS_quic_attach_ack_notifiers_to_packets,
-                              true);
-
   SetPacketLossPercentage(5);
   ASSERT_TRUE(Initialize());