diff --git a/Assets/UniGLTF/Editor/MeshUtility/MaterialKey.cs b/Assets/UniGLTF/Editor/MeshUtility/MaterialKey.cs
deleted file mode 100644
index f7f2832d3..000000000
--- a/Assets/UniGLTF/Editor/MeshUtility/MaterialKey.cs
+++ /dev/null
@@ -1,82 +0,0 @@
-// namespace UniGLTF.MeshUtility
-// {
-//         [Serializable]
-//         struct MaterialKey
-//         {
-//             public string Shader;
-//             public KeyValuePair<string, object>[] Properties;
-
-//             public override bool Equals(object obj)
-//             {
-//                 if (!(obj is MaterialKey))
-//                 {
-//                     return base.Equals(obj);
-//                 }
-
-//                 var key = (MaterialKey)obj;
-
-//                 return Shader == key.Shader
-//                     && Properties.SequenceEqual(key.Properties)
-//                     ;
-//             }
-
-//             public override int GetHashCode()
-//             {
-//                 return base.GetHashCode();
-//             }
-//         }
-
-//         [Serializable]
-//         struct MaterialList
-//         {
-//             public Material[] Materials;
-
-//             public MaterialList(Material[] list)
-//             {
-//                 Materials = list;
-//             }
-//         }
-
-//         static object GetPropertyValue(Shader shader, int i, Material m)
-//         {
-//             var propType = ShaderUtil.GetPropertyType(shader, i);
-//             switch (propType)
-//             {
-//                 case ShaderUtil.ShaderPropertyType.Color:
-//                     return m.GetColor(ShaderUtil.GetPropertyName(shader, i));
-
-//                 case ShaderUtil.ShaderPropertyType.Range:
-//                 case ShaderUtil.ShaderPropertyType.Float:
-//                     return m.GetFloat(ShaderUtil.GetPropertyName(shader, i));
-
-//                 case ShaderUtil.ShaderPropertyType.Vector:
-//                     return m.GetVector(ShaderUtil.GetPropertyName(shader, i));
-
-//                 case ShaderUtil.ShaderPropertyType.TexEnv:
-//                     return m.GetTexture(ShaderUtil.GetPropertyName(shader, i));
-
-//                 default:
-//                     throw new NotImplementedException(propType.ToString());
-//             }
-//         }
-
-//         static MaterialKey GetMaterialKey(Material m)
-//         {
-//             var key = new MaterialKey
-//             {
-//                 Shader = m.shader.name,
-//             };
-
-//             key.Properties = Enumerable.Range(0, ShaderUtil.GetPropertyCount(m.shader))
-//                 .Select(x => new KeyValuePair<string, object>(
-//                     ShaderUtil.GetPropertyName(m.shader, x),
-//                     GetPropertyValue(m.shader, x, m))
-//                     )
-//                 .OrderBy(x => x.Key)
-//                 .ToArray()
-//                     ;
-
-//             return key;
-//         }
-
-// }
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