[Bluetooth][Non-ACR] Fix Hid unregister callback not invoke issue (#3771)

diff --git a/src/Tizen.Network.Bluetooth/Tizen.Network.Bluetooth/BluetoothHidImpl.cs b/src/Tizen.Network.Bluetooth/Tizen.Network.Bluetooth/BluetoothHidImpl.cs
index f4361c6c4c4ff4d5f41ba4837415e05668f034ae..1808b6a4d271d0a94410b3a3a089a2af15cbb1b6 100644 (file)
--- a/src/Tizen.Network.Bluetooth/Tizen.Network.Bluetooth/BluetoothHidImpl.cs
+++ b/src/Tizen.Network.Bluetooth/Tizen.Network.Bluetooth/BluetoothHidImpl.cs
@@ -37,7 +37,7 @@ namespace Tizen.Network.Bluetooth
             }
             remove
             {
-                //nothing to be done
+                _hidConnectionChanged -= value;
             }
         }