diff --git a/src/DotRecast.Recast.Demo/DemoLog.cs b/src/DotRecast.Recast.Demo/DemoLog.cs
deleted file mode 100644
index 29c4b3a..0000000
--- a/src/DotRecast.Recast.Demo/DemoLog.cs
+++ /dev/null
@@ -1,27 +0,0 @@
-using System.Collections.Generic;
-using System.Runtime.CompilerServices;
-using Serilog;
-using Silk.NET.OpenGL;
-
-namespace DotRecast.Recast.Demo;
-
-public static class DemoLog
-{
-    private static readonly ILogger Logger = Log.ForContext(typeof(DemoLog));
-    private static HashSet<string> messages = new();
-    
-    public static void LogIfGlError(GL gl, [CallerMemberName] string method = "", [CallerFilePath] string file = "", [CallerLineNumber] int line = 0)
-    {
-        var err = gl.GetError();
-        if (err == GLEnum.NoError)
-            return;
-
-        var s = $"{method}() err({err}) in {file}:{line}";
-        if (messages.Contains(s))
-            return;
-        
-        messages.Add(s);
-        Logger.Error(s);
-    }
-
-}
\ No newline at end of file