worker: ignore 404 when removing op_state
worker: ignore 404 when removing op_state

It's fine if the gateway deleted it first.

Signed-off-by: Josh Durgin <1442af5e32b56bc0fa9c40ad9e4d67aeb05f1e26@redhat.com>

ceph/radosgw-agent,ceph/radosgw-agent