diff --git a/Wino.Core/Extensions/FolderTreeExtensions.cs b/Wino.Core/Extensions/FolderTreeExtensions.cs
deleted file mode 100644
index 18cf16ca..00000000
--- a/Wino.Core/Extensions/FolderTreeExtensions.cs
+++ /dev/null
@@ -1,31 +0,0 @@
-using Wino.Core.Domain.Interfaces;
-using Wino.Core.Domain.Models.Folders;
-using Wino.Core.MenuItems;
-
-namespace Wino.Core.Extensions
-{
-    public static class FolderTreeExtensions
-    {
-        private static MenuItemBase<IMailItemFolder, FolderMenuItem> GetMenuItemByFolderRecursive(IMailItemFolder structure, AccountMenuItem parentAccountMenuItem, IMenuItem parentFolderItem)
-        {
-            MenuItemBase<IMailItemFolder, FolderMenuItem> parentMenuItem = new FolderMenuItem(structure, parentAccountMenuItem.Parameter, parentFolderItem);
-
-            var childStructures = structure.ChildFolders;
-
-            foreach (var childFolder in childStructures)
-            {
-                if (childFolder == null) continue;
-
-                // Folder menu item.
-                var subChildrenFolderTree = GetMenuItemByFolderRecursive(childFolder, parentAccountMenuItem, parentMenuItem);
-
-                if (subChildrenFolderTree is FolderMenuItem folderItem)
-                {
-                    parentMenuItem.SubMenuItems.Add(folderItem);
-                }
-            }
-
-            return parentMenuItem;
-        }
-    }
-}