[SSSD] [sssd PR#5784][comment] proxy: allow removing group members

[alexey-tikhonov]

URL: https://github.com/SSSD/sssd/pull/5784
Title: #5784: proxy: allow removing group members

alexey-tikhonov commented:
"""
Thank you for changes. ACK from me.

Since I somewhat influenced final solution, would be good to if somebody else took a look.

"""

See the full comment at https://github.com/SSSD/sssd/pull/5784#issuecomment-950870013