diff --git a/src/com/android/settings/bluetooth/BluetoothDeviceUpdater.java b/src/com/android/settings/bluetooth/BluetoothDeviceUpdater.java
index dece0ccccf6..84cab40baaf 100644
--- a/src/com/android/settings/bluetooth/BluetoothDeviceUpdater.java
+++ b/src/com/android/settings/bluetooth/BluetoothDeviceUpdater.java
@@ -127,9 +127,6 @@ public abstract class BluetoothDeviceUpdater implements BluetoothCallback,
         forceUpdate();
     }
 
-    @Override
-    public void onScanningStateChanged(boolean started) {}
-
     @Override
     public void onDeviceAdded(CachedBluetoothDevice cachedDevice) {
         update(cachedDevice);
@@ -148,17 +145,6 @@ public abstract class BluetoothDeviceUpdater implements BluetoothCallback,
         update(cachedDevice);
     }
 
-    @Override
-    public void onConnectionStateChanged(CachedBluetoothDevice cachedDevice, int state) {}
-
-    @Override
-    public void onActiveDeviceChanged(CachedBluetoothDevice activeDevice, int bluetoothProfile) {
-    }
-
-    @Override
-    public void onAudioModeChanged() {
-    }
-
     @Override
     public void onProfileConnectionStateChanged(CachedBluetoothDevice cachedDevice, int state,
             int bluetoothProfile) {
diff --git a/src/com/android/settings/bluetooth/BluetoothSummaryUpdater.java b/src/com/android/settings/bluetooth/BluetoothSummaryUpdater.java
index 03fffa47f06..d577b0ad264 100644
--- a/src/com/android/settings/bluetooth/BluetoothSummaryUpdater.java
+++ b/src/com/android/settings/bluetooth/BluetoothSummaryUpdater.java
@@ -58,30 +58,6 @@ public final class BluetoothSummaryUpdater extends SummaryUpdater implements Blu
         notifyChangeIfNeeded();
     }
 
-    @Override
-    public void onScanningStateChanged(boolean started) {
-    }
-
-    @Override
-    public void onDeviceAdded(CachedBluetoothDevice cachedDevice) {
-    }
-
-    @Override
-    public void onDeviceDeleted(CachedBluetoothDevice cachedDevice) {
-    }
-
-    @Override
-    public void onDeviceBondStateChanged(CachedBluetoothDevice cachedDevice, int bondState) {
-    }
-
-    @Override
-    public void onActiveDeviceChanged(CachedBluetoothDevice activeDevice, int bluetoothProfile) {
-    }
-
-    @Override
-    public void onAudioModeChanged() {
-    }
-
     @Override
     public void register(boolean listening) {
         if (mBluetoothAdapter == null) {
diff --git a/src/com/android/settings/bluetooth/DeviceListPreferenceFragment.java b/src/com/android/settings/bluetooth/DeviceListPreferenceFragment.java
index 7c4224e8d0f..46d649ab405 100644
--- a/src/com/android/settings/bluetooth/DeviceListPreferenceFragment.java
+++ b/src/com/android/settings/bluetooth/DeviceListPreferenceFragment.java
@@ -244,9 +244,6 @@ public abstract class DeviceListPreferenceFragment extends
         }
     }
 
-    @Override
-    public void onBluetoothStateChanged(int bluetoothState) {}
-
     /**
      * Add bluetooth device preferences to {@code preferenceGroup} which satisfy the {@code filter}
      *
@@ -270,14 +267,6 @@ public abstract class DeviceListPreferenceFragment extends
         removeCachedPrefs(preferenceGroup);
     }
 
-    public void onConnectionStateChanged(CachedBluetoothDevice cachedDevice, int state) { }
-
-    @Override
-    public void onActiveDeviceChanged(CachedBluetoothDevice activeDevice, int bluetoothProfile) { }
-
-    @Override
-    public void onAudioModeChanged() { }
-
     /**
      * Return the key of the {@link PreferenceGroup} that contains the bluetooth devices
      */
diff --git a/src/com/android/settings/connecteddevice/AvailableMediaDeviceGroupController.java b/src/com/android/settings/connecteddevice/AvailableMediaDeviceGroupController.java
index 5959414fd3b..183ed3f55d2 100644
--- a/src/com/android/settings/connecteddevice/AvailableMediaDeviceGroupController.java
+++ b/src/com/android/settings/connecteddevice/AvailableMediaDeviceGroupController.java
@@ -28,7 +28,6 @@ import com.android.settings.bluetooth.Utils;
 import com.android.settings.core.BasePreferenceController;
 import com.android.settings.dashboard.DashboardFragment;
 import com.android.settingslib.bluetooth.BluetoothCallback;
-import com.android.settingslib.bluetooth.CachedBluetoothDevice;
 import com.android.settingslib.bluetooth.LocalBluetoothManager;
 import com.android.settingslib.core.lifecycle.LifecycleObserver;
 import com.android.settingslib.core.lifecycle.events.OnStart;
@@ -131,41 +130,6 @@ public class AvailableMediaDeviceGroupController extends BasePreferenceControlle
         mBluetoothDeviceUpdater  = bluetoothDeviceUpdater;
     }
 
-    @Override
-    public void onBluetoothStateChanged(int bluetoothState) {
-        // do nothing
-    }
-
-    @Override
-    public void onScanningStateChanged(boolean started) {
-        // do nothing
-    }
-
-    @Override
-    public void onDeviceAdded(CachedBluetoothDevice cachedDevice) {
-        // do nothing
-    }
-
-    @Override
-    public void onDeviceDeleted(CachedBluetoothDevice cachedDevice) {
-        // do nothing
-    }
-
-    @Override
-    public void onDeviceBondStateChanged(CachedBluetoothDevice cachedDevice, int bondState) {
-        // do nothing
-    }
-
-    @Override
-    public void onConnectionStateChanged(CachedBluetoothDevice cachedDevice, int state) {
-        // do nothing
-    }
-
-    @Override
-    public void onActiveDeviceChanged(CachedBluetoothDevice activeDevice, int bluetoothProfile) {
-        // do nothing
-    }
-
     @Override
     public void onAudioModeChanged() {
         updateTitle();
diff --git a/src/com/android/settings/sound/AudioSwitchPreferenceController.java b/src/com/android/settings/sound/AudioSwitchPreferenceController.java
index dcbed159123..d5e3aff4a4e 100644
--- a/src/com/android/settings/sound/AudioSwitchPreferenceController.java
+++ b/src/com/android/settings/sound/AudioSwitchPreferenceController.java
@@ -184,14 +184,6 @@ public abstract class AudioSwitchPreferenceController extends BasePreferenceCont
         unregister();
     }
 
-    /**
-     * Only concerned about whether the local adapter is connected to any profile of any device and
-     * are not really concerned about which profile.
-     */
-    @Override
-    public void onConnectionStateChanged(CachedBluetoothDevice cachedDevice, int state) {
-    }
-
     @Override
     public void onActiveDeviceChanged(CachedBluetoothDevice activeDevice, int bluetoothProfile) {
         updateState(mPreference);
@@ -208,17 +200,6 @@ public abstract class AudioSwitchPreferenceController extends BasePreferenceCont
         updateState(mPreference);
     }
 
-    @Override
-    public void onBluetoothStateChanged(int bluetoothState) {
-    }
-
-    /**
-     * The local Bluetooth adapter has started the remote device discovery process.
-     */
-    @Override
-    public void onScanningStateChanged(boolean started) {
-    }
-
     /**
      * Indicates a change in the bond state of a remote
      * device. For example, if a device is bonded (paired).
@@ -228,14 +209,6 @@ public abstract class AudioSwitchPreferenceController extends BasePreferenceCont
         updateState(mPreference);
     }
 
-    @Override
-    public void onDeviceDeleted(CachedBluetoothDevice cachedDevice) {
-    }
-
-    @Override
-    public void onDeviceBondStateChanged(CachedBluetoothDevice cachedDevice, int bondState) {
-    }
-
     public void setCallback(AudioSwitchCallback callback) {
         mAudioSwitchPreferenceCallback = callback;
     }