'Functionality' solely depends upon developer's interpretation and
'Test category' is not used. Let's remove them from the kms tests
documentation so that documentation can be made precise which
is easy to maintain.

v2: -rebase

Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
Acked-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Katarzyna Piecielska <katarzyna.piecielska@intel.com>
Reviewed-by: Karthik B S <karthik.b.s@intel.com>