diff --git a/quic/core/quic_sent_packet_manager.cc b/quic/core/quic_sent_packet_manager.cc
index e6500f3..6f5e348 100644
--- a/quic/core/quic_sent_packet_manager.cc
+++ b/quic/core/quic_sent_packet_manager.cc
@@ -239,11 +239,6 @@
       send_algorithm_->SetInitialCongestionWindowInPackets(50);
     }
   }
-  if (GetQuicReloadableFlag(quic_use_ip_bandwidth_module) &&
-      config.HasClientRequestedIndependentOption(kBWS5, perspective)) {
-    initial_congestion_window_ = 10;
-    send_algorithm_->SetInitialCongestionWindowInPackets(10);
-  }
 
   using_pacing_ = !GetQuicFlag(FLAGS_quic_disable_pacing_for_perf_tests);
 
diff --git a/quic/core/quic_sent_packet_manager_test.cc b/quic/core/quic_sent_packet_manager_test.cc
index 5322ffb..7e8e3e7 100644
--- a/quic/core/quic_sent_packet_manager_test.cc
+++ b/quic/core/quic_sent_packet_manager_test.cc
@@ -3313,20 +3313,6 @@
             manager_.GetRetransmissionTime());
 }
 
-TEST_F(QuicSentPacketManagerTest, IW10ForUpAndDown) {
-  SetQuicReloadableFlag(quic_use_ip_bandwidth_module, true);
-  QuicConfig config;
-  QuicTagVector options;
-  options.push_back(kBWS5);
-  QuicConfigPeer::SetReceivedConnectionOptions(&config, options);
-  EXPECT_CALL(*send_algorithm_, SetFromConfig(_, _));
-  EXPECT_CALL(*send_algorithm_, SetInitialCongestionWindowInPackets(10));
-  EXPECT_CALL(*network_change_visitor_, OnCongestionChange());
-  manager_.SetFromConfig(config);
-
-  EXPECT_EQ(10u, manager_.initial_congestion_window());
-}
-
 }  // namespace
 }  // namespace test
 }  // namespace quic