Remove the replicated attribute constants
    
    These pre-existed in ipaserver/install/replication.py.
    
    The constants were only originally used in ldapupdate.py
    but have subsequently been switched to the replication.py
    versions so they are not used anywhere in the code.
    
    https://pagure.io/freeipa/issue/1539
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>