[SSSD] [sssd PR#940][comment] files_ops: Remove unused functions parameter

[mzidek-rh]

URL: https://github.com/SSSD/sssd/pull/940
Title: #940: files_ops: Remove unused functions parameter

mzidek-rh commented:
"""
I will try to review this tomorrow. Assigning to myself for now.
"""

See the full comment at https://github.com/SSSD/sssd/pull/940#issuecomment-553934723