diff --git a/Assets/UniGLTF/Editor/MeshUtility/BoneMeshRemoverValidator.cs b/Assets/UniGLTF/Editor/MeshUtility/BoneMeshRemoverValidator.cs
deleted file mode 100644
index 29d4b7c24..000000000
--- a/Assets/UniGLTF/Editor/MeshUtility/BoneMeshRemoverValidator.cs
+++ /dev/null
@@ -1,66 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using UnityEngine;
-
-namespace UniGLTF.MeshUtility
-{
-    public class BoneMeshRemoverValidator
-    {
-        private Animator _cAnimator = null;
-        private Transform _cEraseRoot = null;
-        private SkinnedMeshRenderer _pSkinnedMesh;
-        private Animator _pAnimator;
-        private Transform _pEraseRoot;
-
-        public void Validate(SkinnedMeshRenderer _skinnedMesh, List<BoneMeshEraser.EraseBone> _eraseBones)
-        {
-            // any better way we can detect component change?
-            if (_skinnedMesh != _pSkinnedMesh || _cAnimator != _pAnimator || _cEraseRoot != _pEraseRoot)
-            {
-                BoneMeshEraserValidate(_skinnedMesh, _eraseBones);
-            }
-            _pSkinnedMesh = _skinnedMesh;
-            _pAnimator = _cAnimator;
-            _pEraseRoot = _cEraseRoot;
-        }
-
-        void BoneMeshEraserValidate(SkinnedMeshRenderer skinnedMeshRenderer, List<BoneMeshEraser.EraseBone> eraseBones)
-        {
-            eraseBones.Clear();
-            if (skinnedMeshRenderer == null)
-            {
-                return;
-            }
-
-            if (_cEraseRoot == null)
-            {
-                if (_cAnimator != null)
-                {
-                    _cEraseRoot = _cAnimator.GetBoneTransform(HumanBodyBones.Head);
-                    //Debug.LogFormat("head: {0}", EraseRoot);
-                }
-            }
-
-            eraseBones.AddRange(skinnedMeshRenderer.bones.Select(x =>
-            {
-                var eb = new BoneMeshEraser.EraseBone
-                {
-                    Bone = x,
-                };
-
-                if (_cEraseRoot != null)
-                {
-                    // 首の子孫を消去
-                    if (eb.Bone.Ancestor().Any(y => y == _cEraseRoot))
-                    {
-                        //Debug.LogFormat("erase {0}", x);
-                        eb.Erase = true;
-                    }
-                }
-
-                return eb;
-            }));
-        }
-    }
-}
diff --git a/Assets/UniGLTF/Editor/MeshUtility/BoneMeshRemoverValidator.cs.meta b/Assets/UniGLTF/Editor/MeshUtility/BoneMeshRemoverValidator.cs.meta
deleted file mode 100644
index 48f27b214..000000000
--- a/Assets/UniGLTF/Editor/MeshUtility/BoneMeshRemoverValidator.cs.meta
+++ /dev/null
@@ -1,11 +0,0 @@
-fileFormatVersion: 2
-guid: fb28fac2e7b5e684fb023a88862106f0
-MonoImporter:
-  externalObjects: {}
-  serializedVersion: 2
-  defaultReferences: []
-  executionOrder: 0
-  icon: {instanceID: 0}
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/Assets/UniGLTF/Editor/MeshUtility/MeshProcessDialog.cs b/Assets/UniGLTF/Editor/MeshUtility/MeshProcessDialog.cs
index 63c0c6e99..b1fc04feb 100644
--- a/Assets/UniGLTF/Editor/MeshUtility/MeshProcessDialog.cs
+++ b/Assets/UniGLTF/Editor/MeshUtility/MeshProcessDialog.cs
@@ -12,8 +12,6 @@ namespace UniGLTF.MeshUtility
 
         private GameObject _exportTarget;
 
-        public BoneMeshRemoverValidator _boneMeshRemoverValidator = new BoneMeshRemoverValidator();
-
         [SerializeField]
         public bool _separateByBlendShape = true;
 
@@ -92,7 +90,6 @@ namespace UniGLTF.MeshUtility
                         {
                             _boneMeshEraserEditor.OnInspectorGUI();
                         }
-                        _boneMeshRemoverValidator.Validate(_skinnedMeshRenderer, _eraseBones);
                         if (TabBoneMeshRemover.TryExecutable(_exportTarget, _skinnedMeshRenderer, out string msg))
                         {
                             processed = TabBoneMeshRemover.OnGUI(_exportTarget, _skinnedMeshRenderer, _eraseBones);