diff --git a/Flow.Launcher.Core/Resource/ThemeManager.cs b/Flow.Launcher.Core/Resource/ThemeManager.cs
deleted file mode 100644
index 3cbe8319a..000000000
--- a/Flow.Launcher.Core/Resource/ThemeManager.cs
+++ /dev/null
@@ -1,12 +0,0 @@
-using System;
-using CommunityToolkit.Mvvm.DependencyInjection;
-
-namespace Flow.Launcher.Core.Resource
-{
-    [Obsolete("ThemeManager.Instance is obsolete. Use Ioc.Default.GetRequiredService<Theme>() instead.")]
-    public class ThemeManager
-    {
-        public static Theme Instance
-            => Ioc.Default.GetRequiredService<Theme>();
-    }
-}
diff --git a/Flow.Launcher/App.xaml.cs b/Flow.Launcher/App.xaml.cs
index 833c63ddf..7b1d113fb 100644
--- a/Flow.Launcher/App.xaml.cs
+++ b/Flow.Launcher/App.xaml.cs
@@ -177,7 +177,6 @@ namespace Flow.Launcher
                 HotKeyMapper.Initialize();
 
                 // main windows needs initialized before theme change because of blur settings
-                // TODO: Clean ThemeManager.Instance in future
                 Ioc.Default.GetRequiredService<Theme>().ChangeTheme();
 
                 Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);