sshd: remove unneeded initialization of libwrap logging severities

[glebius]

Summary

This part of ca573c9a177 proved to be unnecessary. As the removed
comment says, we set them merely for logging syntax errors, as we log
refusals ourselves. However, inside the libwrap the parser logs any
syntax errors with tcpd_warn() which has hardcoded LOG_WARNING inside.

[philip]

If neither allow_severity or deny_severity are referenced anywhere else, this looks good to me.
I have only reviewed the patch. I haven't actually tested it.

crypto/openssh/sshd.c

145

Is allow_severity not referenced anywhere else?