Remove unneeded vim & #! comments.

calibre-plugin/fff_plugin.py

@@ -1,5 +1,5 @@
-#!/usr/bin/env python
-# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
+# -*- coding: utf-8 -*-
+
 from __future__ import (unicode_literals, division, absolute_import,
                         print_function)