We have tox -e gendriverlist that outputs an RST-ish report of all drivers
in the tree. This output can be used in the docs build to automatically
publish the list of drivers to make it easier to find officially supported
drivers.
This effectively removes the existing drivers.html that was generated prior
that did not actually contain any useful information.
Change-Id: I8de78723af76aabcc976733ac4b248db0b8ca16f