smartmontools: Remove obsolete setting regarding the Standard Output
The Standard output type "syslog" is obsolete, causing a warning since systemd
version 246 [1].
Please consider using "journal" or "journal+console"
[1] https://github.com/systemd/systemd/blob/master/NEWS#L202
Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>