diff --git a/p2p/base/p2p_transport_channel.cc b/p2p/base/p2p_transport_channel.cc
index 0c869ff622..070a25b511 100644
--- a/p2p/base/p2p_transport_channel.cc
+++ b/p2p/base/p2p_transport_channel.cc
@@ -872,20 +872,6 @@ void P2PTransportChannel::MaybeStartGathering() {
       SendGatheringStateEvent();
     }
 
-    if (!allocator_sessions_.empty()) {
-      IceRestartState state;
-      if (writable()) {
-        state = IceRestartState::CONNECTED;
-      } else if (IsGettingPorts()) {
-        state = IceRestartState::CONNECTING;
-      } else {
-        state = IceRestartState::DISCONNECTED;
-      }
-      RTC_HISTOGRAM_ENUMERATION("WebRTC.PeerConnection.IceRestartState",
-                                static_cast<int>(state),
-                                static_cast<int>(IceRestartState::MAX_VALUE));
-    }
-
     for (const auto& session : allocator_sessions_) {
       if (session->IsStopped()) {
         continue;
diff --git a/p2p/base/p2p_transport_channel.h b/p2p/base/p2p_transport_channel.h
index 84325b8bef..47f37c8c67 100644
--- a/p2p/base/p2p_transport_channel.h
+++ b/p2p/base/p2p_transport_channel.h
@@ -79,10 +79,6 @@ class RtcEventLog;
 
 namespace cricket {
 
-// Enum for UMA metrics, used to record whether the channel is
-// connected/connecting/disconnected when ICE restart happens.
-enum class IceRestartState { CONNECTING, CONNECTED, DISCONNECTED, MAX_VALUE };
-
 static const int MIN_PINGS_AT_WEAK_PING_INTERVAL = 3;
 
 bool IceCredentialsChanged(absl::string_view old_ufrag,
diff --git a/p2p/base/p2p_transport_channel_unittest.cc b/p2p/base/p2p_transport_channel_unittest.cc
index f4e66ff9ef..63aa126820 100644
--- a/p2p/base/p2p_transport_channel_unittest.cc
+++ b/p2p/base/p2p_transport_channel_unittest.cc
@@ -1478,92 +1478,6 @@ TEST_F(P2PTransportChannelTest, GetStatsSwitchConnection) {
   DestroyChannels();
 }
 
-// Tests that UMAs are recorded when ICE restarts while the channel
-// is disconnected.
-TEST_F(P2PTransportChannelTest, TestUMAIceRestartWhileDisconnected) {
-  rtc::ScopedFakeClock clock;
-  ConfigureEndpoints(OPEN, OPEN, kOnlyLocalPorts, kOnlyLocalPorts);
-
-  CreateChannels();
-  EXPECT_TRUE_SIMULATED_WAIT(CheckConnected(ep1_ch1(), ep2_ch1()),
-                             kDefaultTimeout, clock);
-
-  // Drop all packets so that both channels become not writable.
-  fw()->AddRule(false, rtc::FP_ANY, rtc::FD_ANY, kPublicAddrs[0]);
-  const int kWriteTimeoutDelay = 8000;
-  EXPECT_TRUE_SIMULATED_WAIT(!ep1_ch1()->writable() && !ep2_ch1()->writable(),
-                             kWriteTimeoutDelay, clock);
-
-  ep1_ch1()->SetIceParameters(kIceParams[2]);
-  ep1_ch1()->SetRemoteIceParameters(kIceParams[3]);
-  ep1_ch1()->MaybeStartGathering();
-  EXPECT_METRIC_EQ(1, webrtc::metrics::NumEvents(
-                          "WebRTC.PeerConnection.IceRestartState",
-                          static_cast<int>(IceRestartState::DISCONNECTED)));
-
-  ep2_ch1()->SetIceParameters(kIceParams[3]);
-  ep2_ch1()->SetRemoteIceParameters(kIceParams[2]);
-  ep2_ch1()->MaybeStartGathering();
-  EXPECT_METRIC_EQ(2, webrtc::metrics::NumEvents(
-                          "WebRTC.PeerConnection.IceRestartState",
-                          static_cast<int>(IceRestartState::DISCONNECTED)));
-
-  DestroyChannels();
-}
-
-// Tests that UMAs are recorded when ICE restarts while the channel
-// is connected.
-TEST_F(P2PTransportChannelTest, TestUMAIceRestartWhileConnected) {
-  rtc::ScopedFakeClock clock;
-  ConfigureEndpoints(OPEN, OPEN, kOnlyLocalPorts, kOnlyLocalPorts);
-
-  CreateChannels();
-  EXPECT_TRUE_SIMULATED_WAIT(CheckConnected(ep1_ch1(), ep2_ch1()),
-                             kDefaultTimeout, clock);
-
-  ep1_ch1()->SetIceParameters(kIceParams[2]);
-  ep1_ch1()->SetRemoteIceParameters(kIceParams[3]);
-  ep1_ch1()->MaybeStartGathering();
-  EXPECT_METRIC_EQ(1, webrtc::metrics::NumEvents(
-                          "WebRTC.PeerConnection.IceRestartState",
-                          static_cast<int>(IceRestartState::CONNECTED)));
-
-  ep2_ch1()->SetIceParameters(kIceParams[3]);
-  ep2_ch1()->SetRemoteIceParameters(kIceParams[2]);
-  ep2_ch1()->MaybeStartGathering();
-  EXPECT_METRIC_EQ(2, webrtc::metrics::NumEvents(
-                          "WebRTC.PeerConnection.IceRestartState",
-                          static_cast<int>(IceRestartState::CONNECTED)));
-
-  DestroyChannels();
-}
-
-// Tests that UMAs are recorded when ICE restarts while the channel
-// is connecting.
-TEST_F(P2PTransportChannelTest, TestUMAIceRestartWhileConnecting) {
-  rtc::ScopedFakeClock clock;
-  ConfigureEndpoints(OPEN, OPEN, kOnlyLocalPorts, kOnlyLocalPorts);
-
-  // Create the channels without waiting for them to become connected.
-  CreateChannels();
-
-  ep1_ch1()->SetIceParameters(kIceParams[2]);
-  ep1_ch1()->SetRemoteIceParameters(kIceParams[3]);
-  ep1_ch1()->MaybeStartGathering();
-  EXPECT_METRIC_EQ(1, webrtc::metrics::NumEvents(
-                          "WebRTC.PeerConnection.IceRestartState",
-                          static_cast<int>(IceRestartState::CONNECTING)));
-
-  ep2_ch1()->SetIceParameters(kIceParams[3]);
-  ep2_ch1()->SetRemoteIceParameters(kIceParams[2]);
-  ep2_ch1()->MaybeStartGathering();
-  EXPECT_METRIC_EQ(2, webrtc::metrics::NumEvents(
-                          "WebRTC.PeerConnection.IceRestartState",
-                          static_cast<int>(IceRestartState::CONNECTING)));
-
-  DestroyChannels();
-}
-
 // Tests that a UMA on ICE regathering is recorded when there is a network
 // change if and only if continual gathering is enabled.
 TEST_F(P2PTransportChannelTest,