[SSSD] [sssd PR#628][comment] providers: drop ldap_{init, }groups_use_matching_rule_in_chain support

[fidencio]

URL: https://github.com/SSSD/sssd/pull/628
Title: #628: providers: drop ldap_{init,}groups_use_matching_rule_in_chain support

fidencio commented:
"""
@jhrozek, I **know** your preference of moving the deleted code to a file as the first step and then removing the file in order to make the backport easy for whoever is interested on keeping it downstream. Before actually moving those, I'd like to double-check if the patch is removing the expected piece of code and once we agree on that I'll re-work it and follow your advice/preference.
"""

See the full comment at https://github.com/SSSD/sssd/pull/628#issuecomment-411025608