diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/UriByteBuffer.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/UriByteBuffer.cs
index 2ca07a1ab..e2cb3acc0 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/UriByteBuffer.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/UriByteBuffer.cs
@@ -1,40 +1,9 @@
 using System;
-using System.IO;
 
 namespace UniGLTF
 {
-    /// <summary>
-    /// for buffer with uri read
-    /// </summary>
-    public class UriByteBuffer : IBytesBuffer
+    public static class UriByteBuffer
     {
-        public string Uri
-        {
-            get;
-            private set;
-        }
-
-        Byte[] m_bytes;
-        public ArraySegment<byte> Bytes => new ArraySegment<byte>(m_bytes);
-
-        public UriByteBuffer(string baseDir, string uri)
-        {
-            Uri = uri;
-            m_bytes = ReadFromUri(baseDir, uri);
-        }
-
-        const string DataPrefix = "data:application/octet-stream;base64,";
-
-        const string DataPrefix2 = "data:application/gltf-buffer;base64,";
-
-        const string DataPrefix3 = "data:image/jpeg;base64,";
-
-        [Obsolete("Use ReadEmbedded(uri)")]
-        public static Byte[] ReadEmbeded(string uri)
-        {
-            return ReadEmbedded(uri);
-        }
-
         public static Byte[] ReadEmbedded(string uri)
         {
             var pos = uri.IndexOf(";base64,");
@@ -47,29 +16,5 @@ namespace UniGLTF
                 return Convert.FromBase64String(uri.Substring(pos + 8));
             }
         }
-
-        Byte[] ReadFromUri(string baseDir, string uri)
-        {
-            var bytes = ReadEmbedded(uri);
-            if (bytes != null)
-            {
-                return bytes;
-            }
-            else
-            {
-                // as local file path
-                return File.ReadAllBytes(Path.Combine(baseDir, uri));
-            }
-        }
-
-        public glTFBufferView Extend<T>(ArraySegment<T> array, glBufferTarget target) where T : struct
-        {
-            throw new NotImplementedException();
-        }
-
-        public void ExtendCapacity(int capacity)
-        {
-            throw new NotImplementedException();
-        }
     }
 }