Fix typing issue

MDErrorReporter.php

@@ -196,7 +196,6 @@ final public function sendErrorReport(Throwable $exception, string $recipient, s
         $subject = get_class($exception) . ": " . $exception->getCode();
 
         $description = $addDesc;
-        $description .= $this->_formulateDebugMailSection("Detailed error information", $exception);
 
         $additionalContextInfo = [
             "Message" => $exception->getMessage(),