[SSSD] [sssd PR#631][comment] nss: remove unused label

[sumit-bose]

  URL: https://github.com/SSSD/sssd/pull/631
Title: #631: nss: remove unused label

sumit-bose commented:
"""
I had a minor comment (see inline), please let me know if you agree or if you think that
it would be safer to keep this patch minimal.
"""

See the full comment at https://github.com/SSSD/sssd/pull/631#issuecomment-411814461