The has_FOO for pointer-valued FOO are redundant, except for arrays.
They are also a nuisance to work with. Recent commit "qapi: Start to
elide redundant has_FOO in generated C" provided the means to elide
them step by step. This is the step for qapi/job.json.
Said commit explains the transformation in more detail. The invariant
violations mentioned there do not occur here.
Cc: John Snow<jsnow@redhat.com>
Cc: Vladimir Sementsov-Ogievskiy<vsementsov@yandex-team.ru>
Cc:qemu-block@nongnu.org
Signed-off-by: Markus Armbruster<armbru@redhat.com>