redis locks are no longer necessary (#1098)
redis locks are no longer necessary (#1098)

removing these locks because they frequently fail to release,
and they are actually not necessary

proof:

    LoadResultForStage is enqueued in just one code location,
    that location is unreachable if the job status is already "CHECKED",
    and the job status is changed to CHECKED just before the enqueue,
    ensuring the enqueue can happen just once
chanzuckerberg/idseq-web,chanzuckerberg/idseq-web,chanzuckerberg/idseq-web,chanzuckerberg/idseq-web,chanzuckerberg/idseq-web