Remove the function that not used in BluetoothCallback

Bug: 111811266
Test: Build pass
Change-Id: Ib33ec31607931f5e67d5119cf9b0cb6b894794a0

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) {