Remove outdated devices from Android device chooser

device/bluetooth/bluetooth_device_mac.h

Index: device/bluetooth/bluetooth_device_mac.h
diff --git a/device/bluetooth/bluetooth_device_mac.h b/device/bluetooth/bluetooth_device_mac.h
index 0124eac3d7f793e9981a8bb7000afc0fe46a0989..3840a26283cbe869cafdb23858006acf24175303 100644
--- a/device/bluetooth/bluetooth_device_mac.h
+++ b/device/bluetooth/bluetooth_device_mac.h
@@ -18,10 +18,6 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothDeviceMac : public BluetoothDevice {
  public:
   ~BluetoothDeviceMac() override;
 
-  // Returns the time of the most recent interaction with the device.  Returns
-  // nil if the device has never been seen.
-  virtual NSDate* GetLastUpdateTime() const = 0;
-
   // Converts between ConnectErrorCode and NSError.
   static NSError* GetNSErrorFromConnectErrorCode(
       BluetoothDevice::ConnectErrorCode error_code);