hwmon: remove unused superio_outb function

hwmon: remove unused superio_outb function

clang with W=1 reports
drivers/hwmon/vt1211.c:198:20: error: unused function
  'superio_outb' [-Werror,-Wunused-function]
static inline void superio_outb(int sio_cip, int reg, int val)
                   ^
This function is not used so remove it.

Signed-off-by: Tom Rix <trix@redhat.com>
Acked-by: Juerg Haefliger <juergh@proton.me>
Link: https://lore.kernel.org/r/20230323211535.2637939-1-trix@redhat.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>