misc: chore: Fix warnings in virtual dual Joy-Con code

src/Ryujinx.Input.SDL2/SDL2JoyCon.cs

@@ -52,10 +52,10 @@ namespace Ryujinx.Input.SDL2
 
         private readonly List<ButtonMappingEntry> _buttonsUserMapping;
 
-        private readonly StickInputId[] _stickUserMapping = new StickInputId[(int)StickInputId.Count]
+        private readonly StickInputId[] _stickUserMapping =
-        {
+        [
-            StickInputId.Unbound, StickInputId.Left, StickInputId.Right,
+            StickInputId.Unbound, StickInputId.Left, StickInputId.Right
-        };
+        ];
 
         public GamepadFeaturesFlag Features { get; }
 
@@ -212,7 +212,8 @@ namespace Ryujinx.Input.SDL2
                 Vector3 value = _joyConType switch
                 {
                     JoyConType.Left => new Vector3(-values[2], values[1], values[0]),
-                    JoyConType.Right => new Vector3(values[2], values[1], -values[0])
+                    JoyConType.Right => new Vector3(values[2], values[1], -values[0]),
+                    _ => throw new ArgumentOutOfRangeException()
                 };
 
                 return inputId switch

src/Ryujinx.Input.SDL2/SDL2JoyConPair.cs

@@ -1,6 +1,4 @@
 using Ryujinx.Common.Configuration.Hid;
-using Ryujinx.Common.Configuration.Hid.Controller;
-using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Numerics;
@@ -10,15 +8,6 @@ namespace Ryujinx.Input.SDL2
 {
     internal class SDL2JoyConPair(IGamepad left, IGamepad right) : IGamepad
     {
-        private StandardControllerInputConfig _configuration;
-
-        private readonly StickInputId[] _stickUserMapping =
-        [
-            StickInputId.Unbound,
-            StickInputId.Left,
-            StickInputId.Right
-        ];
-
         public GamepadFeaturesFlag Features => (left?.Features ?? GamepadFeaturesFlag.None) |
                                                (right?.Features ?? GamepadFeaturesFlag.None);