diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index 4cbade8e68e..e7251e78f81 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -1762,7 +1762,6 @@ return array(
     'OC\\Files\\Template\\TemplateManager' => $baseDir . '/lib/private/Files/Template/TemplateManager.php',
     'OC\\Files\\Type\\Detection' => $baseDir . '/lib/private/Files/Type/Detection.php',
     'OC\\Files\\Type\\Loader' => $baseDir . '/lib/private/Files/Type/Loader.php',
-    'OC\\Files\\Type\\TemplateManager' => $baseDir . '/lib/private/Files/Type/TemplateManager.php',
     'OC\\Files\\Utils\\PathHelper' => $baseDir . '/lib/private/Files/Utils/PathHelper.php',
     'OC\\Files\\Utils\\Scanner' => $baseDir . '/lib/private/Files/Utils/Scanner.php',
     'OC\\Files\\View' => $baseDir . '/lib/private/Files/View.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index 79f4c88358f..45c9221f8f4 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -1803,7 +1803,6 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OC\\Files\\Template\\TemplateManager' => __DIR__ . '/../../..' . '/lib/private/Files/Template/TemplateManager.php',
         'OC\\Files\\Type\\Detection' => __DIR__ . '/../../..' . '/lib/private/Files/Type/Detection.php',
         'OC\\Files\\Type\\Loader' => __DIR__ . '/../../..' . '/lib/private/Files/Type/Loader.php',
-        'OC\\Files\\Type\\TemplateManager' => __DIR__ . '/../../..' . '/lib/private/Files/Type/TemplateManager.php',
         'OC\\Files\\Utils\\PathHelper' => __DIR__ . '/../../..' . '/lib/private/Files/Utils/PathHelper.php',
         'OC\\Files\\Utils\\Scanner' => __DIR__ . '/../../..' . '/lib/private/Files/Utils/Scanner.php',
         'OC\\Files\\View' => __DIR__ . '/../../..' . '/lib/private/Files/View.php',
diff --git a/lib/private/Files/Type/TemplateManager.php b/lib/private/Files/Type/TemplateManager.php
deleted file mode 100644
index a0c0e9fac9f..00000000000
--- a/lib/private/Files/Type/TemplateManager.php
+++ /dev/null
@@ -1,50 +0,0 @@
-<?php
-
-/**
- * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
- * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-namespace OC\Files\Type;
-
-/**
- * @deprecated 18.0.0
- */
-class TemplateManager {
-	protected $templates = [];
-
-	public function registerTemplate($mimetype, $path) {
-		$this->templates[$mimetype] = $path;
-	}
-
-	/**
-	 * get the path of the template for a mimetype
-	 *
-	 * @deprecated 18.0.0
-	 * @param string $mimetype
-	 * @return string|null
-	 */
-	public function getTemplatePath($mimetype) {
-		if (isset($this->templates[$mimetype])) {
-			return $this->templates[$mimetype];
-		} else {
-			return null;
-		}
-	}
-
-	/**
-	 * get the template content for a mimetype
-	 *
-	 * @deprecated 18.0.0
-	 * @param string $mimetype
-	 * @return string
-	 */
-	public function getTemplate($mimetype) {
-		$path = $this->getTemplatePath($mimetype);
-		if ($path) {
-			return file_get_contents($path);
-		} else {
-			return '';
-		}
-	}
-}
diff --git a/lib/private/legacy/OC_Helper.php b/lib/private/legacy/OC_Helper.php
index 7417ebf227b..47d2d88e7ea 100644
--- a/lib/private/legacy/OC_Helper.php
+++ b/lib/private/legacy/OC_Helper.php
@@ -32,7 +32,6 @@ use Psr\Log\LoggerInterface;
  * }
  */
 class OC_Helper {
-	private static $templateManager;
 	private static ?ICacheFactory $cacheFactory = null;
 	private static ?bool $quotaIncludeExternalStorage = null;
 
@@ -66,17 +65,6 @@ class OC_Helper {
 		}
 	}
 
-	/**
-	 * @deprecated 18.0.0
-	 * @return \OC\Files\Type\TemplateManager
-	 */
-	public static function getFileTemplateManager() {
-		if (!self::$templateManager) {
-			self::$templateManager = new \OC\Files\Type\TemplateManager();
-		}
-		return self::$templateManager;
-	}
-
 	/**
 	 * detect if a given program is found in the search PATH
 	 *