Revert "[ticket/14562] Language fallback for extension permissions"

This reverts commit 621b958b1c.

phpBB/includes/functions_admin.php

@@ -2991,47 +2991,18 @@ function tidy_database()
 */
 function add_permission_language()
 {
-	global $config, $user, $phpEx, $phpbb_extension_manager;
+	global $user, $phpEx, $phpbb_extension_manager;
 
 	// add permission language files from extensions
 	$finder = $phpbb_extension_manager->get_finder();
 
-	// We grab the language files from the default, English and user's language.
+	$lang_files = $finder
-	// So we can fall back to the other files like we do when using add_lang()
-	$default_lang_files = $english_lang_files = $user_lang_files = array();
-
-	// Search for board default language if it's not the user language
-	if ($config['default_lang'] != $user->lang_name)
-	{
-		$default_lang_files = $finder
-			->prefix('permissions_')
-			->suffix(".$phpEx")
-			->core_path('language/' . basename($config['default_lang']) . '/')
-			->extension_directory('/language/' . basename($config['default_lang']))
-			->find();
-	}
-
-	// Search for english, if its not the default or user language
-	if ($config['default_lang'] != 'en' && $user->lang_name != 'en')
-	{
-		$english_lang_files = $finder
-			->prefix('permissions_')
-			->suffix(".$phpEx")
-			->core_path('language/en/')
-			->extension_directory('/language/en')
-			->find();
-	}
-
-	// Find files in the user's language
-	$user_lang_files = $finder
 		->prefix('permissions_')
 		->suffix(".$phpEx")
 		->core_path('language/' . $user->lang_name . '/')
 		->extension_directory('/language/' . $user->lang_name)
 		->find();
 
-	$lang_files = array_merge($english_lang_files, $default_lang_files, $user_lang_files);
-
 	foreach ($lang_files as $lang_file => $ext_name)
 	{
 		if ($ext_name === '/')