missed one

com.unity.perception/Runtime/Randomization/Samplers/SamplerTypes/ConstantSampler.cs

 using System;
-using UnityEngine.Scripting.APIUpdating;
 
 namespace UnityEngine.Perception.Randomization.Samplers
 {
     [Serializable]
-
     public class ConstantSampler : ISampler
     {
         /// <summary>