This line has been removed in respect to the OpenSSH spec update with Version 7.5 (https://www.openssh.com/txt/release-7.5)
@@ -11,6 +11,5 @@ HostKey /data/ssh/ssh_host_ed25519_key
PermitRootLogin no
AuthorizedKeysFile .ssh/authorized_keys
PasswordAuthentication no
-UsePrivilegeSeparation no
PermitUserEnvironment yes
AllowUsers git