Revert of bluetooth: android: Initial Low Energy Discovery Sessions.

device/bluetooth/bluetooth_adapter_android.h

Index: device/bluetooth/bluetooth_adapter_android.h
diff --git a/device/bluetooth/bluetooth_adapter_android.h b/device/bluetooth/bluetooth_adapter_android.h
index 52e257d8c1f40d80f71db4ed868361e1112720b1..e0625920bbe2f5bac98293ce40acfdc08a783468 100644
--- a/device/bluetooth/bluetooth_adapter_android.h
+++ b/device/bluetooth/bluetooth_adapter_android.h
@@ -20,11 +20,6 @@
 
 // BluetoothAdapterAndroid, along with the Java class
 // org.chromium.device.bluetooth.BluetoothAdapter, implement BluetoothAdapter.
-//
-// The GATT Profile over Low Energy is supported, but not Classic Bluetooth at
-// this time. LE GATT support has been initially built out to support Web
-// Bluetooth, which does not need other Bluetooth features. There is no
-// technical reason they can not be supported should a need arrise.
 //
 // BluetoothAdapterAndroid is reference counted, and owns the lifetime of the
 // Java class BluetoothAdapter via j_adapter_.
@@ -80,9 +75,6 @@
       const CreateAdvertisementCallback& callback,
       const CreateAdvertisementErrorCallback& error_callback) override;
 
-  // Handles a scan error event by invalidating all discovery sessions.
-  void OnScanFailed(JNIEnv* env, jobject obj);
-
  protected:
   BluetoothAdapterAndroid();
   ~BluetoothAdapterAndroid() override;