Move category registration to correct file

public/typo3conf/ext/ep_products/Configuration/TCA/Overrides/tx_epproducts_domain_model_teammember.php

@@ -0,0 +1,12 @@
+<?php
+
+defined('TYPO3_MODE') or die();
+
+call_user_func(function () {
+
+    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::makeCategorizable(
+        'epproducts',
+        'tx_epproducts_domain_model_teammember'
+    );
+
+});

public/typo3conf/ext/ep_products/Configuration/TCA/tx_epproducts_domain_model_teammember.php

@@ -1,10 +1,5 @@
 <?php
 
-\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::makeCategorizable(
-    'epproducts',
-    'tx_epproducts_domain_model_teammember'
-);
-
 return [
 	'ctrl' => [
 		'title'	=> 'LLL:EXT:ep_products/Resources/Private/Language/locallang.xlf:tx_epproducts_domain_model_teammember',