watchdog/hpwdt: Remove redundant test.

ProLiants of vintage to have an iLO 5, no longer send watchdog NMI
as an IO CHECK.  They are presented to hpwdt_pretimeout as NMI_UNKNOWN.
The preceding if statement rejects if !mynmi irrespective of value
of pretimeout making this if statement redundant.

Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231213215340.495734-3-jerry.hoemann@hpe.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>