worker: don't try to remove opstate for deletes
worker: don't try to remove opstate for deletes

Only the copy operation creates an op state. If the object does not
exist, there is no op state to delete.

Signed-off-by: Josh Durgin <51652c783f70f5b272ebd02f1fd20d3af7a2449f@inktank.com>

ceph/radosgw-agent,ceph/radosgw-agent