Fixed warnings when new input system is enabled (#2274)

Author: Antoine Lelievre

com.unity.render-pipelines.core/Runtime/Camera/FreeCamera.cs

@@ -35,6 +35,7 @@ public class FreeCamera : MonoBehaviour
         /// </summary>
         public float m_Turbo = 10.0f;
 
+#if !USE_INPUT_SYSTEM
         private static string kMouseX = "Mouse X";
         private static string kMouseY = "Mouse Y";
         private static string kRightStickX = "Controller Right Stick X";
@@ -44,6 +45,7 @@ public class FreeCamera : MonoBehaviour
 
         private static string kYAxis = "YAxis";
         private static string kSpeedAxis = "Speed Axis";
+#endif
 
 #if USE_INPUT_SYSTEM
         InputAction lookAction;

com.unity.visualeffectgraph/Runtime/Utilities/PropertyBinding/Implementation/VFXInputButtonBinder.cs

@@ -20,7 +20,9 @@ class VFXInputButtonBinder : VFXBinderBase
         public float SmoothSpeed = 2.0f;
         public bool UseButtonSmooth = true;
 
+#if ENABLE_LEGACY_INPUT_MANAGER
         float m_CachedSmoothValue = 0.0f;
+#endif
 
         public override bool IsValid(VisualEffect component)
         {

com.unity.visualeffectgraph/Runtime/Utilities/PropertyBinding/Implementation/VFXInputKeyBinder.cs

@@ -20,7 +20,9 @@ class VFXInputKeyBinder : VFXBinderBase
         public float SmoothSpeed = 2.0f;
         public bool UseKeySmooth = true;
 
+#if ENABLE_LEGACY_INPUT_MANAGER
         float m_CachedSmoothValue = 0.0f;
+#endif
 
         public override bool IsValid(VisualEffect component)
         {