Deprecate FLAGS_quic_reloadable_flag_quic_remove_multipath_bit.

net/quic/core/quic_connection_test.cc

Index: net/quic/core/quic_connection_test.cc
diff --git a/net/quic/core/quic_connection_test.cc b/net/quic/core/quic_connection_test.cc
index 1ac628591a3268083347e2b323d9b522966f666a..6f95275b0ee49882410cd9321c9300d1ca8519e1 100644
--- a/net/quic/core/quic_connection_test.cc
+++ b/net/quic/core/quic_connection_test.cc
@@ -850,7 +850,6 @@ class QuicConnectionTest : public QuicTestWithParam<TestParams> {
         GetPeerInMemoryConnectionId(connection_id_);
     header.public_header.packet_number_length = packet_number_length_;
     header.public_header.connection_id_length = connection_id_length_;
-    header.public_header.multipath_flag = false;
     header.packet_number = number;
     QuicFrames frames;
     frames.push_back(frame);
@@ -963,7 +962,6 @@ class QuicConnectionTest : public QuicTestWithParam<TestParams> {
         GetPeerInMemoryConnectionId(connection_id_);
     header.public_header.packet_number_length = packet_number_length_;
     header.public_header.connection_id_length = connection_id_length_;
-    header.public_header.multipath_flag = false;
     header.packet_number = number;
 
     QuicFrames frames;