Remove astrotools. in the WIKI deploy of the stat module

In the stat module there is the astrotools.module.function format everywhere, which comes from the .rst file:

.. automodule:: astrotools.stat
   :members:
   :undoc-members:
   :show-inheritance:

Removing the astrotools. will cause the WIKI to deploy the os.stat module instead...

See: https://astro.pages.rwth-aachen.de/astrotools/stat.html