diff --git a/custom/Espo/Custom/Controllers/ArticleCategory.php b/custom/Espo/Custom/Controllers/ArticleCategory.php
deleted file mode 100644
index 4b3ebfd916..0000000000
--- a/custom/Espo/Custom/Controllers/ArticleCategory.php
+++ /dev/null
@@ -1,7 +0,0 @@
-<?php
-
-namespace Espo\Custom\Controllers;
-
-class ArticleCategory extends \Espo\Core\Controllers\RecordTree
-{
-}
diff --git a/custom/Espo/Custom/Entities/ArticleCategory.php b/custom/Espo/Custom/Entities/ArticleCategory.php
deleted file mode 100644
index 1e3d49355e..0000000000
--- a/custom/Espo/Custom/Entities/ArticleCategory.php
+++ /dev/null
@@ -1,8 +0,0 @@
-<?php
-
-namespace Espo\Custom\Entities;
-
-class ArticleCategory extends \Espo\Core\Entities\TreeItem
-{
-    protected $entityType = "ArticleCategory";
-}
diff --git a/custom/Espo/Custom/Repositories/ArticleCategory.php b/custom/Espo/Custom/Repositories/ArticleCategory.php
deleted file mode 100644
index 3946e62b55..0000000000
--- a/custom/Espo/Custom/Repositories/ArticleCategory.php
+++ /dev/null
@@ -1,5 +0,0 @@
-<?php
-namespace Espo\Custom\Repositories;
-class ArticleCategory extends \Espo\Core\Templates\Repositories\Base
-{
-}
diff --git a/custom/Espo/Custom/Services/ArticleCategory.php b/custom/Espo/Custom/Services/ArticleCategory.php
deleted file mode 100644
index 15e21e3a42..0000000000
--- a/custom/Espo/Custom/Services/ArticleCategory.php
+++ /dev/null
@@ -1,7 +0,0 @@
-<?php
-
-namespace Espo\Custom\Services;
-
-class ArticleCategory extends \Espo\Services\RecordTree
-{
-}