do not use $_ENV vars for mail template

src/Mailing/Mail.php

@@ -29,13 +29,6 @@ class Mail
     {
         $this->body = file_get_contents(ROOT . '/mail/' . $template . '.html');
 
-        $baseParameters = [
-            'APP_NAME' => $_ENV['APP_NAME'],
-            'BASE_URL' => $_ENV['APP_URL'],
-        ];
-
-        $params = array_merge($baseParameters, $params);
-
         foreach ($params as $key => $param) {
             $this->body = str_replace('{{' . $key . '}}', $param, $this->body);
         }