Remove now unnecessary kldstat check before attempting to load modules.
Since r233109, kldload has the -n option, which silently ignores options
that are already loaded.
Note that this script no longer reports if the module is already loaded,
but it could be argued this wasn't particularly useful information.
Reviewed by: bcr (docs), kib, rgrimes (visual)
Approved by: jilles
Differential Revision: https://reviews.freebsd.org/D18670