[SSSD] [sssd PR#1007][comment] LDAP: Remove unused sdap_refresh code

[elkoniu]

URL: https://github.com/SSSD/sssd/pull/1007
Title: #1007: LDAP: Remove unused sdap_refresh code

elkoniu commented:
"""
I just need to check one thing - if similar functions for AD and IPA are unused too.
@jhrozek if those functions will be unused should I remove them in this PR or make new one?
"""

See the full comment at https://github.com/SSSD/sssd/pull/1007#issuecomment-601172020