fixing the build test fails

com.unity.perception/Editor/Validation/ModelTestUI.cs

 using UnityEngine;
 using static UnityEngine.Perception.Content.CharacterValidation;
 using System.Linq;
-using UnityEngine.Perception.GroundTruth;
 
 public class AssetValidation : EditorWindow
 {

com.unity.perception/Runtime/Validation.meta

-fileFormatVersion: 2
-guid: c202baa8b32f07b4e9d5f928e71d5ee0
-folderAsset: yes
-DefaultImporter:
-  externalObjects: {}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: