Other changes in create-spdx code mean we shouldn't need to do this now. We
need the various exclusions to allow the task hashes to behave correctly
for the SPDX tasks too.
(From OE-Core rev: 5e645ff3d02decba4ed7d082a0e41a2655862039)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>