Docs: remove '_static' subdirectory
Docs: remove '_static' subdirectory

This suppresses a warning when buildind the docs with Sphinx

n0n0x/fabtools-python,wagigi/fabtools-python,sociateru/fabtools,ahnjungho/fabtools,pombredanne/fabtools,prologic/fabtools,AMOSoft/fabtools,bitmonk/fabtools,ronnix/fabtools,badele/fabtools,davidcaste/fabtools,fabtools/fabtools,hagai26/fabtools