Update ExtLibs/ArduPilot/Joystick/JoystickBase.cs

Co-authored-by: Copilot <[email protected]>

Author: meee1

ExtLibs/ArduPilot/Joystick/JoystickBase.cs

@@ -1,7 +1,6 @@
 using log4net;
 using MissionPlanner.ArduPilot;
 using MissionPlanner.Utilities;
-using Newtonsoft.Json;
 using System;
 using System.Collections;
 using System.Collections.Generic;