Removes unused Doxyfile.
Removes unused Doxyfile.

The Doxyfile in the repo root was not used, there is a
doxygen.cfg.in in the doc/ directory, which is configured
by CMake.

Signed-off-by: Tobias Olausson <8ce91aefe24c8d194408283a3289b56e24b026bb@gmail.com>

frznlogic/softwarecontainer,kursatkobya/softwarecontainer,frznlogic/softwarecontainer,DunderRoffe/softwarecontainer,Pelagicore/softwarecontainer,DunderRoffe/softwarecontainer,kursatkobya/softwarecontainer,tobsan/softwarecontainer,Pelagicore/softwarecontainer,DunderRoffe/softwarecontainer,thenor/softwarecontainer,tobsan/softwarecontainer,thenor/softwarecontainer,DunderRoffe/softwarecontainer,frznlogic/softwarecontainer,tobsan/softwarecontainer,Pelagicore/softwarecontainer,Pelagicore/softwarecontainer,thenor/softwarecontainer,kursatkobya/softwarecontainer,kursatkobya/softwarecontainer,tobsan/softwarecontainer,thenor/softwarecontainer,frznlogic/softwarecontainer