Merge pull request #58725 from nextcloud/jtr/docs-config-mount-file-drop

docs(config): drop legacy `mount_file` option

Author: CarlSchwan

config/config.sample.php

@@ -2504,13 +2504,6 @@
 	 */
 	'part_file_in_storage' => true,
 
-	/**
-	 * Specify the location of the ``mount.json`` file.
-	 *
-	 * Defaults to ``data/mount.json`` in the Nextcloud directory.
-	 */
-	'mount_file' => '/var/www/nextcloud/data/mount.json',
-
 	/**
 	 * Read-only mode for scan/detection reconciliation writes to filecache.
 	 *